The most serious violation of an assumption for an analysis of variance occurs when
A)the populations are strongly skewed in the positive direction.
B)the scores between and within groups are dependent.
C)the variance estimate of the group with the largest estimate is twice that of the smallest.
D)the number of scores in each group is less than 10.

Question

Quizplus · Accepted Answer

The assumption of independence of scores within and between groups is crucial for an analysis of variance. Violation of this assumption can lead to inflated Type I error rates and incorrect conclusions. Therefore, it is the most serious violation. The other options (A, C, and D) are also important assumptions for an analysis of variance, but they are not as serious as the violation of independence.

The Most Serious Violation of an Assumption for an Analysis