When is it appropriate to use the paired difference t-test?
A) Four samples are compared at once
B) Any two samples are compared
C) Two independent samples are compared
D) Two dependent samples are compared

Question

Quizplus · Accepted Answer

The paired difference t-test, also known as the dependent samples t-test, is used when two dependent samples are being compared. This means that the two samples are related to each other in some way, such as a before-and-after measurement or matched pairs. The test is used to determine whether there is a significant difference between the two sets of measurements. Option A is incorrect because the paired difference t-test only applies to two samples, while option B is incorrect because not all pairs of samples are related or dependent. Option C is incorrect because the situation requires an independent samples t-test.

When Is It Appropriate to Use the Paired Difference T-Test