A sample is selected from a population with ? = 46, and a treatment is administered to the sample. After treatment, the sample mean is M = 48 with a sample variance of s2 = 16 . Based on this information, what is the value of Cohen's d?
a. d = 0.125
b. d = 0.25
c. d = 0.50
d. Cohen's d cannot be computed without knowing the sample size.
C
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