The overall test of the significance of the difference among groups in an analysis of variance is called
A)an omnibus test.
B)a planned comparison.
C)an absolute contrast.
D)a post-hoc test.

Question

Quizplus · Accepted Answer

The overall test to determine if there is a significant difference among groups in an analysis of variance is called an omnibus test. This test assesses the null hypothesis that all group means are equal. If the null hypothesis is rejected, post-hoc tests or planned comparisons may be conducted to determine which specific groups differ from each other. Absolute contrast is not a common term in the context of ANOVA.

The Overall Test of the Significance of the Difference Among