An dependent t-test is used to test for
A) Differences between means of groups containing different people when the data are normally distributed, have equal variances and data are at least interval.
B) Differences between means of groups containing different people when the data are not normally distributed or have unequal variances.
C) Differences between means of groups containing the same people when the data are normally distributed, have equal variances and are at least interval.

Question

Quizplus · Accepted Answer

An dependent t-test is used to compare the means of two dependent samples. This means that the same individuals are measured twice, and we are interested in the difference between the two measurements. Therefore, option C, which talks about comparing means of groups containing the same people, is the correct answer. The assumption of normality and equal variances is also important to ensure accurate results from the independent t-test.

An Dependent T-Test Is Used to Test for