When the assumption of sphericity is violated what action is needed?
A) Correct the model degrees of freedom.
B) Correct the error degrees of freedom.
C) Do both a and
D) Correct the F-ratio.

Question

Quizplus · Accepted Answer

When the assumption of sphericity is violated, both the model and error degrees of freedom should be corrected to adjust for the error in the ANOVA F-ratio calculation. This can be done using a correction factor such as Greenhouse-Geisser or Huynh-Feldt.

When the Assumption of Sphericity Is Violated What Action Is