After performing a one-factor ANOVA test, John noticed that the sample standard deviations for his four groups were, respectively, 33, 24, 79, 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

The sample standard deviations are quite different from each other, which violates the assumption of homogeneity of variances. Therefore, John should use Hartley's test to check if the variances are significantly different before trusting the ANOVA results.

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