When we have two independent samples, the best measure of effect size
A) will use a pooled standard deviation.
B) might be based on the standard deviation of a control group.
C) both a and b
D) is best based on the standard deviation of the treatment group.

Question

Quizplus · Accepted Answer

When we have two independent samples, the best measure of effect size will use a pooled standard deviation. This is because pooling the standard deviation of both groups accounts for differences in variances between the two groups, making it a more accurate measure of effect size. The standard deviation of a single group (whether it be the treatment or control group) may not provide as accurate of a comparison between the two groups.

When We Have Two Independent Samples, the Best Measure of Effect