A sample of difference scores has a mean of M_D = 5 with a variance of s² = 100.If effect size is measured using Cohen's d,what is the value of d? A)d = 5/10 B)d = 5/100 C)d = 25/100 D)This cannot be determined without knowing the sample size.

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Quizplus · Accepted Answer

Cohen's d is calculated as the mean difference divided by the standard deviation. Given a variance of 100, the standard deviation is the square root of 100, which is 10. Therefore, d = 5 / 10.

A Sample of Difference Scores Has a Mean of MD

A Sample of Difference Scores Has a Mean of M_D