Question 1:
Which of the following functions can be used to create a scatter plot in R?
A) hist()
B) boxplot()
C) plot()
D) barplot()
Answer: C) plot()
Explanation:
The function plot() can be used to create scatter plots in R. The hist() function creates histograms, the boxplot() function creates boxplots, and the barplot() function creates bar charts.
Question 2:
What is the purpose of the function read.csv() in R?
A) To create a scatter plot
B) To read data from a CSV file
C) To create a histogram
D) To create a boxplot
Answer:
B) To read data from a CSV file
Explanation:
The function read.csv() in R is used to read data from a CSV (Comma-Separated Values) file. This function reads the data from the file and stores it in a data frame in R.
It is a commonly used function in data analysis as CSV files are a common format for storing and sharing data. The function does not create scatter plots, histograms, or boxplots.
For any Statistics related queries, Call us/ WhatsApp - +1 (315) 557-6473
You can mail us at - support@statisticsassignmenthelp.com, or reach us atwww.statisticsassignmenthelp.com
Question 3:
Which of the following statements is true about R programming language?
A) R is a general-purpose programming language
B) R is primarily used for web development
C) R is a functional programming language
D) R is a compiled language
Answer:
C) R is a functional programming language
Explanation:
R is a programming language that is primarily used for data analysis and statistical computing. It is a functional programming language, which means that functions are treated as first-class objects and can be passed as arguments to other functions. R is not a general-purpose programming language, as it is designed specifically for data analysis tasks. It is not primarily used for web development, although it can be used for developing web-based data analysis applications. R is an interpreted language, not a compiled language.
For any Statistics related queries, Call us/ WhatsApp - +1 (315) 557-6473
You can mail us at - support@statisticsassignmenthelp.com, or reach us atwww.statisticsassignmenthelp.com
Question 4:
What is the purpose of the function lm() in R?
A) To create a scatter plot
B) To fit a linear model to data
C) To create a histogram
D) To create a boxplot
Answer:
B) To fit a linear model to data
Explanation:
The function lm() in R is used to fit a linear model to data. Linear regression is a statistical technique that is used to model the relationship between a dependent variable and one or more independent variables. The lm() function takes the form of the linear model equation and the data as input and returns a model object that can be used to make predictions and perform other analyses. The function does not create scatter plots, histograms, or boxplots.
For any Statistics related queries, Call us/ WhatsApp - +1 (315) 557-6473
You can mail us at - support@statisticsassignmenthelp.com, or reach us atwww.statisticsassignmenthelp.com
Question 5:
Which of the following functions can be used to calculate the mean of a vector in R?
A) sum()
B) min()
C) max()
D) mean()
Answer:
D) mean()
Explanation:
The function mean() in R can be used to calculate the mean of a vector, which is the average value of the elements in the vector. The sum() function calculates the sum of the elements in a vector, while the min() and max() functions find the minimum and maximum values in a vector, respectively. However, none of these functions directly calculate the mean of a vector.
For any Statistics related queries, Call us/ WhatsApp - +1 (315) 557-6473
You can mail us at - support@statisticsassignmenthelp.com, or reach us at -
www.statisticsassignmenthelp.com