A planned comparison comparing two means involves figuring an F ratio in which the denominator
A)depends on the pair of means being compared.
B)has degrees of freedom equal to the total within-groups degrees of freedom of the two groups being compared.
C)is the overall within-groups population variance estimate,regardless of the pair of means being compared.
D)does not involve figuring an F ratio for any planned comparison.

Question

Quizplus · Accepted Answer

The denominator in an F ratio for a planned comparison involving two means is the overall within-groups population variance estimate. This value is used as a common error term for comparing any pair of group means, ensuring that the comparison is standardized across the experiment.

A Planned Comparison Comparing Two Means Involves Figuring an F