What Does Mauchly's Test Measure and in Which Situations Can

Multiple Choice

What does Mauchly's test measure and in which situations can you use it?

A) It is a test of normal distribution and it looks at the difference scores across the conditions in repeated measures design. It can be used only if we have three or more repeated measures conditions.
B) It is a test of variance and it looks at the homogeneity in the difference scores across the conditions in repeated measures design. It can be used only if we have two repeated measures conditions.
C) It is a test of sphericity and it looks at the variance in the difference scores across the conditions in repeated measures design. It can be used only if we have three or more repeated measures conditions.
D) It is a test of significance and it looks at the difference in the difference scores across the conditions in repeated measures design. It can be used only if we have three or more repeated measures conditions.