AP Statistics : How to find the t-distribution

Study concepts, example questions & explanations for AP Statistics

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Example Questions

Example Question #1 : Measures Of Distributions

The purpose of the t test is to do which of the following?

Possible Answers:

Determine the ability of one variable to predict another.

Compare the means of separate populations.

Describe the variance within a population.

Test the relationship between five or more variables.

Compare the significance of multiple variables.

Correct answer:

Compare the means of separate populations.


A t test is used to compare the means of different groups.  A t test score describes the likelihood that the difference in means between two groups is due to chance. The null hypothesis assumes the two sets are equal however, one can reject the null hypothesis with a p value within a particular confidence level.

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