Question: 15. A random sample is obtained from a population with a mean of p. = 100, and a treatment is administered to the sample. After

15. A random sample is obtained from a population with a mean of p. = 100, and a treatment is administered to the sample. After treatment, the sample mean is found to be M = 104 and the sample variance is s 2 = 400.

a. Assuming the sample contained n = \6 individuals, measure the size of the treatment effect by computing Cohen's d and r 2

b. Assuming the sample contained n = 25 individuals, measure the size of the treatment effect by computing Cohen's d and r 1

c. Comparing your answers from parts

(a) and (b), how does sample size influence measures of effect size?

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