Researchers are interested in the potential of famotidine as a potential new dru

Question

Researchers are interested in the potential of famotidine as a potential new drug to be used in the treatment of schizophrenia and assess the drug’s effectiveness by testing people with a schizophrenia measure in which lower scores indicate less symptoms of schizophrenia. Assume it is known that the population mean of this measure is 36.20. In a trial of the drug, 49 individuals had a mean of 33.62, with a standard deviation of 6.11. Calculate Cohen’s d as a measure of effect size of the new drug

Explanation / Answer

population mean = 36.20

sample size = n= 49

sample mean = 33.62

standard deviation = 6.11

Cohen’s d = X - U / s.d = 33.62 - 36.20 / 6.11 = -0.422

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