A Researcher Reports That the Mean Difference in the Body

question 35

Multiple Choice

A researcher reports that the mean difference in the body weight of rats following a pharmacological versus control treatment is 14 grams,with a pooled sample variance equal to 256.What is the effect size for this test using estimated Cohen's d?

• A)d = 0.06;small effect size
• B)d = 0.08;small effect size
• C)d = 0.88;large effect size
• D)There is not enough information to answer this question.

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