A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of µ = 80 and a standard deviation of ? = 12. After treatment, the effect size is measured by computing Cohen's d, and a value of d = 0.50 is obtained. Based on this information, what is the mean for the treated sample?
A) ?M = 6
B) ?M = 82
C) ?M = 86
D) ?This cannot be answered without knowing the sample size.
C
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What will be an ideal response?
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