If a study involves comparing two means from a within-subjects design, the appropriate statistical test is ______.
A) a one-sample t test
B) an independent samples t test
C) a paired/related samples t test
D) an ANOVA

Question

Quizplus · Accepted Answer

A paired/related samples t test is appropriate for comparing two means from a within-subjects design because it takes into account the relatedness of the data (i.e. each participant is measured in both conditions) and controls for individual differences. The one-sample t test is used for comparing a sample mean to a known or hypothesized population mean. The independent samples t test is used for comparing means from two different groups or conditions. ANOVA is used when comparing means from three or more groups or conditions.

If a Study Involves Comparing Two Means from a Within-Subjects