Statistics for Social Sciences Mock Exam - 1925 Verified Questions

Statistics for Social Sciences Mock Exam https://quizplus.com/study-set/3316 32 Chapters 1925 Verified Questions

Statistics for Social Sciences Mock Exam Course Introduction Statistics for Social Sciences introduces students to the fundamental concepts and methods of statistical analysis as applied to research in sociology, psychology, political science, and related disciplines. The course covers descriptive statistics, probability, sampling methods, hypothesis testing, correlation, regression, and the interpretation of statistical data in real-world contexts. Emphasizing both theoretical understanding and practical application, students learn how to analyze and present data, critically evaluate research findings, and utilize statistical software relevant to the social sciences. By the end of the course, students will be equipped with the quantitative skills necessary to design research studies and contribute meaningfully to evidence-based discussions in their fields.

Recommended Textbook Stats Data and Models 1st Canadian Edition by Richard D. De Veaux

Available Study Resources on Quizplus 32 Chapters 1925 Verified Questions 1925 Flashcards Source URL: https://quizplus.com/study-set/3316

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Chapter 1: Data Available Study Resources on Quizplus for this Chatper 30 Verified Questions 30 Flashcards Source URL: https://quizplus.com/quiz/65791

Sample Questions Q1) A monthly electric bill in dollars A)Categorical B)Quantitative Answer: B Q2) A Fortune 500 company concerned about the retirement investments made by its employees,collected

the

following

data:

age

of

employee,amount

contributed

monthly,and type of contribution. A)Age

of

employee,quantitative,years;amount

contributed

monthly,quantitative,dollars;type of contribution,quantitative,dollars. B)Age of employee,quantitative,years;amount contributed monthly,categorical;type of contribution,categorical; C)Age

of

employee,quantitative,years;amount

monthly,quantitative,dollars;type

of

contributed

contribution,categorical;Fortune

500

companies,categorical. D)Age

of

employee,quantitative,years;amount

contributed

monthly,quantitative,dollars;type of contribution,categorical. E)Age of employee,quantitative,years;amount contributed monthly,quantitative,dollars. Answer: D To view all questions and flashcards with answers, click on the resource link above.

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Chapter 2: Displaying and Describing Categorical Data Available Study Resources on Quizplus for this Chatper 65 Verified Questions 65 Flashcards Source URL: https://quizplus.com/quiz/65792

Sample Questions Q1) Of the 1,606 applicants to a college program,456 were Black or Hispanic,300 were Asian,and 850 were White.Summarize the relative frequency distribution of ethnicity with a sentence or two in the proper context. A)Of the 1,606 students who applied for admission to the college program,3% were Black or Hispanic,2% were Asian,and 5% were White. B)Of the 1,606 students who applied for admission to the college program,54% were Black or Hispanic,35% were Asian,and 53% were White. C)Of the 1,606 students who applied for admission to the college program,14% were Black,14% were Hispanic,19% were Asian,and 53% were White. D)Of the 1,606 students accepted in the college program,28% were Black or Hispanic,19% were Asian,and 53% were White. E)Of the 1,606 students who applied for admission to the college program,28% were Black or Hispanic,19% were Asian,and 53% were White. Answer: E To view all questions and flashcards with answers, click on the resource link above.

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Chapter 3: Displaying and Summarizing Quantitative Data Available Study Resources on Quizplus for this Chatper 93 Verified Questions 93 Flashcards Source URL: https://quizplus.com/quiz/65793

Sample Questions Q1) How would you describe the shape of each distribution? A)Class 1: left-skewed,spread out ranging from about 40 to 90 Class 2: left-skewed,spread out ranging from about 40 to 90 Class 3: symmetric,spread out ranging from about 40 to 90 B)Class 1: fairly symmetric,spread out ranging from about 40 to 90 Class 2: right-skewed,spread out ranging from about 40 to 90 Class 3: symmetric,spread out ranging from about 40 to 90 C)Class 1: fairly symmetric,spread out ranging from about 40 to 90 Class 2: left-skewed,spread out ranging from about 40 to 90 Class 3: symmetric,spread out ranging from about 40 to 90 D)Class 1: left-skewed,spread out ranging from about 40 to 90 Class 2: right-skewed,spread out ranging from about 40 to 90 Class 3: symmetric,spread out ranging from about 40 to 90 E)Class 1: fairly symmetric,spread out ranging from about 40 to 90 Class 2: left-skewed,spread out ranging from about 40 to 90 Class 3: asymmetric,spread out ranging from about 40 to 90 Answer: C To view all questions and flashcards with answers, click on the resource link above.

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Chapter 4: Understanding and Comparing Distributions Available Study Resources on Quizplus for this Chatper 102 Verified Questions 102 Flashcards Source URL: https://quizplus.com/quiz/65794

Sample Questions Q1) A small company employs a supervisor at $1,300 a week,an inventory manager at $900 a week,5 stock boys at $400 a week,and 3 drivers at $500 a week. A)1,300,400,450,500,400 dollars B)400,400,450,500,1,300 dollars C)400,400,900,500,1,300 dollars D)2,000,400,450,1,500,1,300 dollars E)400,400,450,900,1,300 dollars Q2) For which class are the mean and median most different? A)Class 2,because the shape is symmetric. B)Class 2,because the shape is skewed to the right. C)Class 1,because the shape is skewed to the left. D)Class 3,because the shape is symmetric. E)Class 2,because the shape is skewed to the left. Q3) Which class had the largest standard deviation? A)Class 3,because the shape has the highest number of students. B)Class 1 or 2,but you can't tell for sure which one. C)Class 3,because the shape is symmetric. D)Class 1,because the shape is not perfectly symmetric. E)None,because the classes had the same standard deviation. To view all questions and flashcards with answers, click on the resource link above. Page 6

Chapter 5: The Standard Deviation As a Ruler and the Normal Model Available Study Resources on Quizplus for this Chatper 131 Verified Questions 131 Flashcards Source URL: https://quizplus.com/quiz/65795

Sample Questions Q1) The mean weight of babies born in a hospital last year was 2.84 kg.Suppose the standard deviation of the weights is 0.95 kg.Which would be more unusual,a baby weighing 1.8 kg or a baby weighing 3.83 kg? Explain. A)A 1.8 kg baby is more unusual (z = -1.09)compared with a 3.83 kg baby (z = 1.04). B)A 3.83 kg baby is more unusual (z = 1.90)compared with a 1.8 kg baby (z = 4.05). C)A 3.83 kg baby is more unusual (z = -1.09)compared with a 1.8 kg baby (z = -1.09). D)A 1.8 kg baby is more unusual (z = -1.05)compared with a 3.83 kg baby (z = -1.04). E)A 3.83 kg baby is more unusual (z = 1.04)compared with a 1.8 kg baby (z = -1.09). Q2) 0 < z < 3.01 A)99.87% B)43.67% C)49.87% D)12.17% E)50.13% To view all questions and flashcards with answers, click on the resource link above.

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Chapter 6: Scatterplots, association, and Correlation Available Study Resources on Quizplus for this Chatper 74 Verified Questions 74 Flashcards Source URL: https://quizplus.com/quiz/65796

Sample Questions Q1) A science instructor assigns a group of students to investigate the relationship between the pH of the water of a river and its water's hardness (measured in grains).Some students wrote these conclusions: "there was a very strong correlation of 1.35 between pH of the water and water's hardness." Is the calculation of the correlation appropriate? A)Yes: correlation can be greater than 1. B)Yes: the pH and the hardness of the water are data collected from the same river. C)No: there is little or no association. D)No: correlation cannot be greater than 1. E)No: correlation must be equal to 1. Q2) Air pressure,altitude A)Positive,straight,strong B)Positive,straight,moderate C)Negative,nonlinear,strong D)Negative,straight,moderate E)Negative,straight,strong To view all questions and flashcards with answers, click on the resource link above.

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Chapter 7: Linear Regression Available Study Resources on Quizplus for this Chatper 57 Verified Questions 57 Flashcards Source URL: https://quizplus.com/quiz/65797

Sample Questions Q1) A random sample of records of electricity usage of homes gives the amount of electricity used in July and size (in square feet)of 135 homes.A regression to predict the amount of electricity used (in kilowatt-hours)from size was completed.The residuals plot indicated that a linear model is appropriate.What are the variables and units in this regression? A)Amount of electricity used (in kilowatt-hours)is y and size (in square feet)is x. B)Amount of electricity used (in kilowatt-hours)is y and number of homes is x. C)Size (in square feet)is y and amount of electricity used (in kilowatt-hours)is x. D)Size (in square feet)is y and number of homes is x. E)Number of homes is y and amount of electricity used (in kilowatt-hours)is x. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 8: Regression Wisdom Available Study Resources on Quizplus for this Chatper 32 Verified Questions 32 Flashcards Source URL: https://quizplus.com/quiz/65798

Sample Questions Q1) A university studied students' grades and established a strong positive association between the high school average of incoming students and their university GPA.Describe three different possible cause-and-effect relationships that might be present. A)Perhaps higher high school averages cause higher university GPAs,or both could be caused by a lurking variable such as the students' IQ. B)There is only one cause-and-effect relationship: higher university GPAs cause higher high school averages. C)There is only one cause-and-effect relationship: higher high school averages cause higher university GPAs. D)There are only two cause-and-effect relationships: higher high school averages cause higher university GPAs,or higher university GPAs cause higher high school averages. E)Perhaps higher high school averages cause higher university GPAs,higher university GPAs cause higher high school averages,or both could be caused by a lurking variable such as the students' high school. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 9: Re-Expressing Data: Get It Straight Available Study Resources on Quizplus for this Chatper 51 Verified Questions 51 Flashcards Source URL: https://quizplus.com/quiz/65799

Sample Questions Q1) The relationship between two quantities x and y is examined.The relationship appears to be fairly linear.A linear model is considered,and the regression analysis is as follows: Dependent variable: y R-squared = 87.9% VARIABLE COEFFICIENT Intercept 37.74 X -9.97 What does the slope say about the relationship between x and y? A)For each increase in x of 1,the corresponding average decrease in y is 9.97. B)For each increase in x of 1,the corresponding average increase in y is 37.74. C)For each increase in x of 1,the corresponding average decrease in y is 37.74. D)For each increase in x of 1,the corresponding average increase in y is 9.97. E)For each increase in x of 1,y decreases by and average of 87.9%. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 10: Understanding Randomness Available Study Resources on Quizplus for this Chatper 26 Verified Questions 26 Flashcards Source URL: https://quizplus.com/quiz/65800

Sample Questions Q1) For a particular miniature golf hole,the chance of getting a hole-in-one is only 18%.The chance of sinking any subsequent putt is 50%.Estimate the average number of putts for this hole.(NOTE: A hole-in-one counts as one putt. )Use 30 runs in your simulation. A)About 3.5 putts B)About 4.5 putts C)About 4.0 putts D)About 2.5 putts E)About 1.5 putts Q2) A university in your region estimates that graduating average of high school students who apply for admission to a particular university program can be described by a Normal model with a mean of 82% and a standard deviation of 5%.The staff in admissions open the applications at random looking for 10 applicants with averages above 85%.How many applications do you think the staff will need to open? A)About 36 applications. B)About 21 applications. C)About 10 applications. D)About 28 applications. E)About 14 applications. To view all questions and flashcards with answers, click on the resource link above. Page 12

Chapter 11: Sample Surveys Available Study Resources on Quizplus for this Chatper 50 Verified Questions 50 Flashcards Source URL: https://quizplus.com/quiz/65801

Sample Questions Q1) A magazine publisher mails a survey to every subscriber asking about the quality of its subscription service.Mailing a survey to every subscriber represents what? A)The sampling frame B)A census C)The sample D)The population parameter of interest E)The sampling method Q2) A popular soft drink company periodically sets up survey booths in various malls and grocery stores that are chosen at random.The employees working the booths ask interested individuals to fill out a very short survey on the quality of the company's drinks.While filling out the surveys,the individuals are told that a properly completed survey will be rewarded with giveaways,such as free samples,T-shirts,generous coupons,and possibly an appearance in a new television commercial.What,if any,will be the most noticeable bias? A)Voluntary response bias B)Undercoverage of the population C)Response bias D)Nonresponse bias E)There does not seem to be any bias. To view all questions and flashcards with answers, click on the resource link above. Page 13

Chapter 12: Experiments and Observational Surveys Available Study Resources on Quizplus for this Chatper 87 Verified Questions 87 Flashcards Source URL: https://quizplus.com/quiz/65802

Sample Questions Q1) Researchers reported that for men,being unmarried increases the risk of depression.These findings were based on the medical records of 400 married men and 500 unmarried men.Why is this conclusion not justified? Q2) An education researcher was interested in examining the effect of the teaching method and the teacher on students' reading levels.257 students participated in an experiment.There were two different teachers (Juliana and Felix)and three different teaching methods (A,B,and C).Students were randomly assigned to a teaching method and teacher.At the end of the semester the students took a reading test on which they received a score out of 20.Students who studied with Felix using method B achieved the highest scores.Identify the factor(s)in the experiment and the number of levels for each. A)Score on reading test (20 levels) B)The teacher and teaching method combination (6 levels) C)Juliana and method A,Juliana and method B,Juliana and method C,Felix and method A,Felix and method B,Felix and method C (6 levels) D)Teaching method (3 levels),teacher (2 levels),score on reading test (20 levels) E) Teaching method (3 levels) and teacher (2 levels) Q3) Explain the difference between an observational study and an experiment. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 13: From Randomness to Probability Available Study Resources on Quizplus for this Chatper 64 Verified Questions 64 Flashcards Source URL: https://quizplus.com/quiz/65803

Sample Questions Q1) A family has two children;record the genders in order of birth. A){BB,BG,GG},equally likely B){BB,BG,GB,GG},equally likely C){BB,BG,GG},not equally likely D){BB,BG,GB,GG},not equally likely E){B,G},equally likely Q2) At the horse racing track,a gambler bets on the wrong horse in a 10-horse field nine times in a row.Later,when talking to a friend,he said he was confident that he would pick the winner the next time,because he was "due to pick a winner." Comment on his reasoning. A)This is false reasoning because he doesn't appear to be lucky. B)This is false reasoning because there is no Law of Averages for independent events. C)When there are 10 horses in a race and he has chosen the wrong horse nine times in a row,he statistically should pick a winner the next time. D)If he doesn't pick the winning horse the next time,he will shortly after that. E)None of the above apply. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 14: Probability Rules Available Study Resources on Quizplus for this Chatper 90 Verified Questions 90 Flashcards Source URL: https://quizplus.com/quiz/65804

Sample Questions Q1) According to a survey conducted by an environmental organization,the probability that an eligible voter cares strongly about environmental issues is 0.60,the probability that an eligible voter votes regularly is 0.48 and the probability that an eligible voter both votes regularly and care strongly about environmental issues is 0.270.What is the probability that someone who cares strongly about environmental issues votes regularly? A)0.270 B)0.810 C)0.450 D)0.563 E)0.210 Q2) A consumer organization estimates that 32% of the households in a particular community have one television set,38% have two sets,and 16% have three or more sets.If two households are chosen at random,what is the probability that at least one has one ore more television sets? A)0.241 B)0.986 C)0.740 D)0.020 E)0.860 To view all questions and flashcards with answers, click on the resource link above. Page 16

Chapter 15: Random Variables Available Study Resources on Quizplus for this Chatper 112 Verified Questions 112 Flashcards Source URL: https://quizplus.com/quiz/65805

Sample Questions Q1) You pick a card from a deck.If you get a face card,you win $15.If you get an ace,you win $30 plus an extra $60 for the ace of hearts.For any other card you win nothing.Find the expected amount you will win. A)$8.08 B)$4.62 C)$6.92 D)$6.35 E)$7.50 Q2) Your school's soccer team plays two games against another soccer team .The probability that your team wins the first game is 0.4.If your team wins the first game,the probability that they also win the second game is 0.5.If your team loses the first game,the probability that they win the second game is 0.2.Let the random variable X be the number of games won by your team.Find the standard deviation of X. A)σ = 0.63 B)σ = 0.90 C)σ = 0.70 D)σ = 0.60 E)σ = 0.78 To view all questions and flashcards with answers, click on the resource link above.

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Chapter 16: Probability Models Available Study Resources on Quizplus for this Chatper 114 Verified Questions 114 Flashcards Source URL: https://quizplus.com/quiz/65806

Sample Questions Q1) A computer salesman averages 1.9 sales per week.Use the Poisson distribution to find the probability that in a randomly selected week the number of computers sold is 1. A)0.2842 B)0.3552 C)0.7158 D)0.3126 E)0.5399 Q2) A basketball player has made 70% of his foul shots during the season.If he shoots 6 foul shots in tonight's game,what is the probability that he makes none of the shots? A)0.1176 B)0.18 C)0.42 D)0.0007 E)0.3 To view all questions and flashcards with answers, click on the resource link above.

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Chapter 17: Sampling Distribution Models Available Study Resources on Quizplus for this Chatper 45 Verified Questions 45 Flashcards Source URL: https://quizplus.com/quiz/65807

Sample Questions Q1) When a truckload of oranges arrives at a packing plant,a random sample of 125 is selected and examined.The whole truckload will be rejected if more than 8% of the sample is unsatisfactory.Suppose that in fact 11% of the oranges on the truck do not meet the desired standard.What's the probability that the shipment will be accepted anyway? A)0.0827 B)0.2846 C)0.9173 D)0.1423 E)0.8577 Q2) If we imagine all the possible random samples of 150 students at this university,95% of the samples should have means between what two numbers? A)$2,206.06 and $2,793.94 B)$150.00 and $2,695.96 C)$2,304.04 and $2,695.96 D)$300 and $4900 E)$150.00 and $2,597.98 To view all questions and flashcards with answers, click on the resource link above.

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Chapter 18: Confidence Intervals for Proportions Available Study Resources on Quizplus for this Chatper 56 Verified Questions 56 Flashcards Source URL: https://quizplus.com/quiz/65808

Sample Questions Q1) Of 346 items tested,12 are found to be defective.Construct a 98% confidence interval for the percentage of all such items that are defective. A)(1.18%,5.76%) B)(0.93%,6.00%) C)(3.34%,3.59%) D)(1.85%,5.09%) E)(0.13%,6.80%) Q2)

Of

130

randomly

selected

adults,32

were

found

to

have

high

blood

pressure.Construct a 95% confidence interval for the percentage of all adults who have high blood pressure. A)(17.2%,32.0%) B)(15.8%,33.4%) C)(15.0%,34.2%) D)(14.9%,34.4%) E)(18.4%,30.8%) Q3) A mayoral election race is tightly contested.In a random sample of 1,900 likely voters,1,007 said that they were planning to vote for the current mayor.Based on this sample,would you claim with 95% confidence that the mayor will win a majority of the votes? Explain. To view all questions and flashcards with answers, click on the resource link above. Page 20

Chapter 19: Testing Hypotheses About Proportions Available Study Resources on Quizplus for this Chatper 50 Verified Questions 50 Flashcards Source URL: https://quizplus.com/quiz/65809

Sample Questions Q1) An airline's public relations department says that the airline rarely loses passengers' luggage.It further claims that on those occasions when luggage is lost,92% is recovered and delivered to its owner within 24 hours.A consumer group who surveyed a large number of air travelers found that only 145 out of 165 people who lost luggage on that airline were reunited with the missing items by the next day.Does this cast doubt on the airline's claim? Use a calculator to find z-scores and P-values. Q2) A newspaper is considering the launch of an online edition.The newspaper plans to go ahead only if it's convinced that more than 35% of current readers would subscribe.The newspaper contacts a simple random sample of 1000 current subscribers,and 345 of those surveyed expressed interest.What should the company do? Test an appropriate hypothesis and state your conclusion.Be sure the appropriate assumptions and conditions are satisfied before you proceed.Use a calculator to find z-scores and P-values. Q3) During the 2004 season,home teams in the same conference won 189 out of 302 regular season college basketball games.Test the home team advantage hypothesis and state your conclusion.Be sure the appropriate assumptions and conditions are satisfied before you proceed. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 20: More About Tests Available Study Resources on Quizplus for this Chatper 69 Verified Questions 69 Flashcards Source URL: https://quizplus.com/quiz/65810

Sample Questions Q1) A university wants to increase its retention rate of 4% for graduating students from the previous year.After implementing several new programs during the last two years,the university reevaluated its retention rate.Identify the Type I error in this context. A)The university stops all new programs,but in fact retention is on the rise and the programs help. B)The university concludes that retention is on the rise,but in fact the new programs do not help retention. C)The product of the university's sample size and sample proportion was less than 10. D)The university sampled all students at the university. E)The university concludes that retention is on the rise since the retention rate can only increase. Q2) A city claims that 75% of all low income housing is 1500 sq.ft.The tenants believe the proportion of housing this size is smaller than the claim,and hire an independent firm to test a random sample size of 120 and found 1500 sq.ft.housing at 66%.Test an appropriate hypothesis using α = 0.01 and state your conclusion.Be sure the appropriate assumptions and conditions are satisfied before you proceed. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 21: Comparing Two Proportions Available Study Resources on Quizplus for this Chatper 52 Verified Questions 52 Flashcards Source URL: https://quizplus.com/quiz/65811

Sample Questions Q1) A survey of randomly chosen adults found that 30 of the 64 women and 49 of the 74 men follow regular exercise programs.Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs. A)(-0.356,-0.030) B)(-0.387,0.631) C)(-0.387,0.662) D)(0.306,0.631) E)(0.276,0.662) Q2) A survey of randomly selected university students found that 83 of the 110 first year students and 87 of the 120 second year students surveyed had purchased used textbooks in the past year.Construct a 98% confidence interval for the difference in the proportions of first and second year university students who purchased used textbooks. A)(-0.084,0.868) B)(-0.105,0.164) C)(0.641,0.868) D)(0.620,0.890) E)(0.620,0.868) To view all questions and flashcards with answers, click on the resource link above.

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Chapter 22: Inferences About Means Available Study Resources on Quizplus for this Chatper 106 Verified Questions 106 Flashcards Source URL: https://quizplus.com/quiz/65812

Sample Questions Q1) How much fat do reduced fat cookies typically have? You take a random sample of 51 reduced-fat cookies and test them in a lab,finding a mean fat content of 3.2 grams and a standard deviation of 1.1 grams of fat.Create a 99% confidence interval for the mean grams of fat. A)(2.80,3.60) B)(3.14,3.26) C)(2.79,3.61) D)(2.78,3.62) E)(2.10,4.30) Q2) A group of researchers wants to determine the mean annual household income for families receiving services at a large community centre.They randomly select ten families

and

record

the

following

household

incomes:

$43,955,$42,740,$42,660,$43,800,$43,500,$44,250,$44,340,$40,390,$44,150,$44,200.Decide whether or not the conditions and assumptions for inference with a t-test are satisfied.Explain your answer. Q3) An independent laboratory tests 100 light bulbs,finding that the mean life is 103 hours with a standard deviation of 11 hours.Decide whether or not the conditions and assumptions for inference with a t-test are satisfied.Explain your answer. To view all questions and flashcards with answers, click on the resource link above. Page 24

Chapter 23: Comparing Means Available Study Resources on Quizplus for this Chatper 43 Verified Questions 43 Flashcards Source URL: https://quizplus.com/quiz/65813

Sample Questions Q1) A researcher is interested in the academic performance differences between individuals using an optimistic versus a pessimistic approach to their studies.If the researcher fails to find a significant difference,when in fact one exists in the population: A)the research hypothesis was correctly accepted. B)a Type I error has been made. C)the null hypothesis was correctly rejected. D)the null hypothesis was correctly accepted. E)a Type II error has been made. Q2) When we fail to reject the null hypothesis,we A)claim that a significant difference exists between groups. B)have committed a Type I error. C)have obtained a t-value greater than our critical t-value. D)conclude that sampling variability is responsible for our obtained difference. E)have committed a Type II error. Q3) Compare the technique for decision making about populations using the hypothesis test method and the confidence interval method. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 24: Paired Samples and Blocks Available Study Resources on Quizplus for this Chatper 33 Verified Questions 33 Flashcards Source URL: https://quizplus.com/quiz/65814

Sample Questions Q1) A researcher is interested in investigating whether people perform better at dexterity tests while listening to classical music or to no music.He designs a dexterity test,and first gives it to his participants while classical music is playing,and then while no music is playing. A)Paired

t-test,since

there

are

two

sets

of

measurements

on

the

same

subjects,providing a natural linking. B)1-sample t-test,since there is only one sample of subjects taking the dexterity tests. C)Not enough information is given to determine the best type of test. D)z-test,since the researcher can find the standard deviation of his population. E)Two-sample t-test,since how a subject performs with music should have no influence on how he performs without music,creating two independent samples. Q2) An agricultural company wanted to know if a new insecticide increases corn yields.Eight test plots showed an average increase of 3.125 bushels per acre when the insecticide was used compared to the previous year.The standard deviation of the increases was 2.911 bushels per acre.The company wants to use a paired t-test to determine the mean increase in yield. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 25: Comparing Counts Available Study Resources on Quizplus for this Chatper 78 Verified Questions 78 Flashcards Source URL: https://quizplus.com/quiz/65815

Sample Questions Q1) Among the eastern provinces in 2010,states,Nova Scotia has 40% of the total population,New Brunswick has 33%,Newfoundland has 21%,and Prince Edward Island has 6%.A market researcher selects a sample of 1000 subjects in 2011,with 450 in Nova Scotia,340 in New Brunswich,150 in Newfoundland,and 60 in Prince Edward Island.Does the distribution of the sample agree with the population distribution? Use a 1% level of significance. Q2) Describe the null hypothesis for the test of independence.List the assumptions for the χ² test of independence.What is the major difference between the assumptions for this test and the assumptions for the previous tests we have studied? Q3) Describe a goodness-of-fit test.What assumptions are made when using a goodness-of-fit test? Q4) Explain why a chi-square goodness-of-fit test is always right-tailed. Q5) When performing a chi-square goodness-of-fit test,why do large values of the test statistic suggest that the variable does not have the distribution stated in the null hypothesis? Refer to the formula for the test statistic in your explanation. Q6) What is the null hypothesis for the chi-square test of independence? What assumptions are required for this test? To view all questions and flashcards with answers, click on the resource link above. Page 27

Chapter 26: Inferences for Regression Available Study Resources on Quizplus for this Chatper 51 Verified Questions 51 Flashcards Source URL: https://quizplus.com/quiz/65816

Sample Questions Q1) When performing regression analysis,different samples will all yield the same sample regression line. A)True B)False Q2) In the context of regression analysis,the sum of the residuals is always zero. A)True B)False Q3) In the context of regression analysis,explain what is meant by the term "residual". Q4) If the assumptions for regression inferences are met,what would you expect to see when constructing a residual plot and a normal probability plot for the residuals? To view all questions and flashcards with answers, click on the resource link above.

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Chapter 27: Analysis of Variance Available Study Resources on Quizplus for this Chatper 39 Verified Questions 39 Flashcards Source URL: https://quizplus.com/quiz/65817

Sample Questions Q1) An electrical engineer wants to compare the resistance of four types of wire made from different materials.Five wires of equal lengths and cross sectional areas are prepared for each of the four wire types.Each section of wire is randomly tested by sending a current through the wire and measuring the resistance.How many degrees of freedom does the treatment sum of squares have? How about the error sum of squares? A)df-treatment = 4;df-error = 19 B)df-treatment = 3;df-error = 17 C)df-treatment = 3;df-error = 16 D)df-treatment = 4;df-error = 20 E)df-treatment = 3;df-error = 19 Q2) A horticulturist wants to test the effectiveness of four types of fertilizer on the growth rate of Bermuda grass.Six sections of grass are randomly assigned to each of the four fertilizer types,and the rate of growth for each section is measured.The F-value from an ANOVA is 10.866.What is the P-value? A)p = 0.0002 B)p = 0.010 C)p = 0.001 D)p = 0.0001 E)p = 0.0011 To view all questions and flashcards with answers, click on the resource link above. Page 29

Chapter 28: Multifactor Analysis of Variance Available Study Resources on Quizplus for this Chatper 22 Verified Questions 22 Flashcards Source URL: https://quizplus.com/quiz/65818

Sample Questions Q1) A student runs an experiment on test scores for males and females at different times of day.She uses 4 different times of day. A)Gender SS: 1 df;Time SS: 3 df;SSE: 3 df B)Gender SS: 1 df;Time SS: 4 df;SSE: 4 df C)Gender SS: 2 df;Time SS: 3 df;SSE 3 df D)Gender SS: 1 df;Time SS: 3 df;SSE: 8 df E)Gender SS: 2 df;Time SS: 4 df;SSE: 8 df Q2) A student runs an experiment to study the effect of gas brand and car type on mileage.She uses 3 different brands of gas on 8 different types of cars. A)Gas brand SS: 3 df;Car type SS: 7 df;SSE: 14 df B)Gas Brand SS: 3 df;Car type SS: 4 df;SSE: 12 df C)Gas brand SS: 1 df;Car type SS: 7 df;SSE 14 df D)Gas Brand SS: 2 df;Car type SS: 3 df;SSE: 8 df E)Gas brand SS: 2 df;Car type SS: 7 df;SSE 14 df Q3) A student runs an experiment to study the effect that a teacher has based on the size of their class.She uses 3 different teachers on 5 different class sizes. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 29: Multiple Regression Available Study Resources on Quizplus for this Chatper 22 Verified Questions 22 Flashcards Source URL: https://quizplus.com/quiz/65819

Sample Questions Q1) Interpret the R-squared value of 84.5%. A)84.5% of all calorie contents can be accurately predicted by this model. B)The average correlation between protein,fat,fibre,carbohydrates,and sugar is 0.845. C)The average correlation between protein,fat,fibre,carbohydrates,and sugar is 0.919. D)84.5% of all samples would result in a useful model. E)84.5% of the observed variation in calorie content can be explained by this model. Q2) Every extra metre of the length adds 5.2 kg to the average weight. A)This is not correct.Every extra foot of the length adds 5.2 kg to the average weight,for a given chest size and sex. B)This is correct. C)This is not correct.Weight,the response variable,does not effect length. D)This is not correct.Length does not effect weight. E)This is not correct.Every extra inch of the length adds 3.6 pounds to the average weight. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 30: Multiple Regression Wisdom Available Study Resources on Quizplus for this Chatper 21 Verified Questions 21 Flashcards Source URL: https://quizplus.com/quiz/65820

Sample Questions Q1) A real estate agent wishes to predict the selling price of a home based on several variables.One categorical variable of interest is the quality of the home - low,medium,or high.If the real estate agent wished to include "quality" in a regression model,how many indicator variables would he/she need to use in the model? A)4 B)3 C)0 D)1 E)2 Q2) How would you interpret the coefficient of sex in this model? Q3) How would you interpret the coefficient of Science in the multiple regression? Q4) What is the purpose of an indicator variable in a regression model? A)An indicator variable allows us to increase our R-squared value. B)An indicator variable allows us to include quantitative variables in our model. C)An indicator variable allows us to fix violations of our constant variance assumption. D)An indicator variable allows us to fix violations of our normality assumption. E)An indicator variable allows us to include categorical variables in our model. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 31: Rank-Based Nonparametric Tests Available Study Resources on Quizplus for this Chatper 29 Verified Questions 29 Flashcards Source URL: https://quizplus.com/quiz/65821

Sample Questions Q1) Fifty (50)students took a math test before and after tutoring.Of the 50 students,34 showed an improvement and 2 showed no change.After ranking the remaining 48 differences (before - after),it is found that T- = 873 and T+ = 303 Do the data suggest that the tutoring improves math scores? Conduct a Wilcoxon signed rank test using a 0.01 level of significance. To view all questions and flashcards with answers, click on the resource link above.

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Chapter 32: The Bootstrap Available Study Resources on Quizplus for this Chatper 31 Verified Questions 31 Flashcards Source URL: https://quizplus.com/quiz/65822

Sample Questions Q1) Consider the following sample of three measurements {4,8,13}.How many distinct resamples are possible? A)27 B)24 C)3 D)6 E)10 Q2) Consider the following sample of four measurements {2,5,11,14}.Five bootstrap samples

of

this

sample

produced

the

following

resamples:

{2,5,5,14},{5,11,11,11},{2,11,14,14},{2,2,14,14}, {5,5,11,14}.Based on these five resamples,find the bootstrap of the standard error of the sample mean. A)0.6452 B)4.5667 C)8.6 D)1.4427 E)2.0813 To view all questions and flashcards with answers, click on the resource link above.

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