After performing a one-factor ANOVA test,John noticed that the sample standard deviations for his four groups were,respectively,33,24,73,and 35.John should:
A) feel confident in his ANOVA test.
B) use Hartley's test to check his assumptions.
C) use an independent samples t-test instead of ANOVA.
D) use a paired t-test instead of ANOVA.

Question

Quizplus · Accepted Answer

One of the assumptions of ANOVA is that the variances of the groups being tested are equal. The large differences in sample standard deviations suggest that this assumption may not be met, so John should use Hartley's test to further investigate whether the variances are significantly different before relying on his ANOVA results.

After Performing a One-Factor ANOVA Test,John Noticed That the Sample