Question

Why is there no point in doing a post-hoc test for the effects of 'sex' in an ANOVA?

a. The 'sex' variable is not a factor in ANOVA
b. Post-hoc tests are only applicable to within-group differences
c. 'Sex' is a categorical variable with only two levels
d. ANOVA already assesses overall group differences

Answer 1

A post-hoc test is unnecessary for the effects of 'sex' in an ANOVA because it assesses overall group differences and 'sex' is a categorical variable. Post-hoc tests are only applicable to within-group differences and 'sex' represents a between-group difference.

Step-by-step explanation:

Doing a post-hoc test for the effects of 'sex' in an ANOVA is not necessary because of multiple reasons:

1. Post-hoc tests are only applicable to within-group differences, not between-group differences. 'Sex' is a categorical variable that represents a between-group difference, so a post-hoc test is not applicable.
2. The ANOVA test already assesses overall group differences, including the effects of 'sex'. It compares the means of multiple groups to determine if there is a statistically significant difference among them.
3. 'Sex' is a categorical variable with only two levels, which means there are only two groups to compare. In this case, a post-hoc test is not necessary since the ANOVA already determines if there is a significant difference between the two groups.