Computing a one-way ANOVA, Janet learns that there is a significant difference among the four groups in her study. To reveal precisely which group or groups differ from the rest, she must
A) construct a BESD.
B) do tests of simple effects.
C) calculate the effect sizes and corresponding confidence intervals.
D) compute another ANOVA.

Question

Quizplus · Accepted Answer

To determine which group or groups differ from the rest, tests of simple effects should be done. This is because a significant overall difference among the groups does not reveal which specific groups are different from one another. Tests of simple effects are conducted to compare the means of each group pair, to determine where the differences lie.

Computing a One-Way ANOVA, Janet Learns That There Is a Significant