Which of the following statements about the assumption of sphericity is not true?
A) It is tested using Mauchly's test in SPSS.
B) It does not apply when a variable has only two levels.
C) It does not apply when multivariate tests are used.
D) It is the assumption that the variances for levels of a repeated-measures variable are equal.

Question

Quizplus · Accepted Answer

Sphericity is the assumption that the variances of the differences between all combinations of related groups are equal, not the variances of the levels themselves.

Which of the Following Statements About the Assumption of Sphericity