In the worksheet exercise, why is there no result for Mauchly's test of sphericity for the main effect of therapy type?
A) Because it is significant
B) Because it is not significant
C) Because there are more than two conditions in the therapy type IV, so sphericity cannot be calculated.
D) Because there are only two conditions in the therapy type IV, so sphericity cannot be calculated.

Question

Quizplus · Accepted Answer

Mauchly's test of sphericity is not applicable when there are only two conditions in the independent variable (in this case, therapy type) because sphericity is a concept that applies to designs with three or more levels or conditions. With only two levels, the assumption of sphericity is inherently met.

In the Worksheet Exercise, Why Is There No Result for Mauchly's