A researcher comparing the means of two groups calculates the t-test for independent means and reports the following result: t(22) = -3.54, p

Question

A researcher comparing the means of two groups calculates the t-test for independent means and reports the following result: t(22) = -3.54, p <.01. This research study consisted of a TOTAL of ______ participants.
A) 20
B) 22
C) 24
D) 26

Quizplus · Accepted Answer

The t-test for independent means indicates that there were two groups in the study. The degrees of freedom (df) is 22, which means that the total number of participants in the study was 22 + 22 = 44. Therefore, the answer is C) 24, which is the closest even number to half of the total number of participants (44/2=22) and represents the sample size of each group.

A Researcher Comparing the Means of Two Groups Calculates the T-Test