What is Hypotheses testing and what are its types?

What is Hypotheses testing and what are its types? Give some examples An Academic presentation by Dr. Nancy Agnes, Head, Technical Operations, Tutors India Group www.tutorsindia.com Email: info@tutorsindia.com

Introduction • Analytical methods are needed to handle the challenges posed by extensive data.

• The

earliest

and

the

most

commonly

used

statistical analysis is hypothesis testing, whose first use dates back to 1710 by John Arbuthnot

• Hypothesis

testing

finds

its

application

in

business,

marketing, finance, biology, medicine, social science and psychology

Types and examples of hypothesis testing • A statistical technique called hypothesis testing is used to assess a claim or hypothesis about a population parameter using sample data.

• It involves setting up a null hypothesis, the claim being tested, and an alternative hypothesis, which is the opposite of the null hypothesis.

There are several types of hypothesis testing, which are as follows:

• One-sample hypothesis testing: This type of test compares the mean of a sample to a known value or a hypothesised value.

Example: • A researcher wants to test whether the average height of students in a school is 6 feet.

• The null hypothesis is that the average height is 6 feet, and the alternative hypothesis is that it is not equal to 6 feet.

contd.. .

• Two-sample hypothesis testing: The most common type of hypothesis testing, this test compares the means of two different samples to determine whether they are significantly different

Example: • The average salary for male and female employees will be compared to see if there is any discernible difference.

•

While the null hypothesis states that there is no difference in the average salary, the alternative hypothesis is that there is a difference

contd.. .

• Chi-square test If there is a significant correlation between two categorical variables, it will be revealed by this kind of test.

Example: • A researcher wants to test whether a significant association between smoking status and lung cancer exists.

• For this research null hypothesis states that there is no association between smoking status and lung cancer, and the alternative hypothesis states that there is an association.

contd.. .

• ANOVA (analysis of variance): This kind of test is used to examine whether the means of three or more groups differ significantly from one another

Example: • A researcher wants to ascertain whether a statistically significant difference exists in the mean test scores from three teaching approaches.

• There is no difference in the mean score, according to the null hypothesis.

• On the contrary, the alternative hypothesis is that at least one of the average scores is different from the others.

Conclusion • Hypothesis testing is a crucial aspect of statistical analysis that allows researchers to draw valid conclusions about populations based on sample data

• One-sample, two-sample, chi-square and ANOVA are the types of hypothesis testing that find their applications for analysing quantitative studies.

• Tutors India offers statistical services for research in various fields, for statistical analysis is a critical component of quantitative research.

• In addition, its team of experts assists in complete dissertation writing and offers publication support and editing services enabling students to publish their manuscripts in reputed journals.

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