Question: A treatment is administered to a sample selected from a population with a mean of = 80 and a standard deviation of =

A treatment is administered to a sample selected from a population with a mean of

µ = 80 and a standard deviation of σ = 10.

After treatment, the sample mean is M = 85.

Based on this information, the effect size as measured by Cohen’s d is _____.

a. d = 5.00

b. d = 2.00

c. d = 0.50

d. impossible to calculate without more information

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