A repeated-measures study uses a total of n = 10 participants to compare two treatment conditions.How many scores are measured in this study,and how many scores are actually used to compute the sample mean and the sample variance?
A)20 measured and 10 used
B)20 measured and 20 used
C)10 measured and 10 used
D)10 measured and 20 used

Question

Quizplus · Accepted Answer

In a repeated-measures study with 10 participants comparing two conditions, each participant provides one score per condition, resulting in 20 scores measured. However, only the difference scores (10) are used to compute the sample mean and variance.

A Repeated-Measures Study Uses a Total of N = 10