The t test for nonindependent samples is when
A) the two groups tested are randomly formed samples.
B) the two groups tested are initially the same on the dependent variable.
C) the two groups are formed by preexisting samples.
D) matching has been done or in a pre-post design.

Question

Quizplus · Accepted Answer

The t test for nonindependent samples is also called a paired or dependent samples t test. It is used when the two groups being compared are not independent of each other, for example, in a pre-post design or when participants are matched. Option D correctly identifies this scenario. Options A, B, and C all refer to independent samples t tests.

The T Test for Nonindependent Samples Is When