The use of the t test for independent groups assumes _________.
A) is normally distributed
B) s 12 = s 22
C) is normally distributed
D) all of these
E) is normally distributed and s 12 = s 22

Question

The use of the t test for independent groups assumes _________.
A) is normally distributed 
B) s 12 = s 22 
C) is normally distributed 
D) all of these 
E) is normally distributed and s 12 = s 22

Quizplus · Accepted Answer

The use of the t test for independent groups assumes that the population from which the two samples are drawn is normally distributed and that the variances of the two populations are equal. Therefore, the correct choice is E, which states that both of these assumptions must be met.

The Use of the T Test for Independent Groups Assumes