Rousseau visually inspects her data before analyzing it only to find that the populations that she sampled appear to have very different variances although her sample sizes are equal.Which assumption of ANOVA has she violated and what should she do?
A) Heteroscedasticity; she should analyze the data as is but not report it.
B) Heteroscedasticity; she should report it with her statistics after analyzing the data.
C) Homoscedasticity; she should proceed as long as the largest variance is not greater than two times the smallest variance and report it with her statistics.
D) Homoscedasticity; she should substitute some of the data points with the mean of each sample.

Question

Quizplus · Accepted Answer

Homoscedasticity is the assumption that the variances across groups are equal for the purposes of conducting an ANOVA. If the largest variance is not more than twice the smallest variance, it's often considered an acceptable violation of this assumption, but it should be reported.

Rousseau Visually Inspects Her Data Before Analyzing It Only to Find