Computing a two-independent sample t test is appropriate when
A)different participants are assigned to each group
B)the population variance is unknown
C)participants are observed one time
D)all of the above

Question

Quizplus · Accepted Answer

All of the given options are appropriate for conducting a two-independent sample t test. Different participants are assigned to each group to compare their mean scores. The population variance is unknown because the two samples have different characteristics. And, participants are observed only one time to keep the samples independent from each other, which is necessary for conducting the t test. Therefore, option D is the correct answer.

Computing a Two-Independent Sample T Test Is Appropriate When