For a within-subjects study evaluating the mean difference between two treatment conditions,the appropriate hypothesis test is
A)independent-measures t test.
B)repeated-measures t test.
C)single-factor analysis of variance.
D)chi-square test for independence.

Question

Quizplus · Accepted Answer

A within-subjects study means that each participant is measured in both treatment conditions, which makes the data paired. Therefore, a repeated-measures t test is the appropriate hypothesis test to evaluate the mean difference between the two conditions. Option A (independent-measures t test) is not appropriate because it assumes independent observations. Option C (single-factor ANOVA) is not appropriate because it is used when comparing more than two group means. Option D (chi-square test for independence) is not appropriate because it is used when comparing categorical variables.

For a Within-Subjects Study Evaluating the Mean Difference Between Two