A treatment is administered to a sample of n = 4 individuals selected from a population with a mean of m = 80 and a standard deviation of s = 10. After treatment, the effect size is measured by computing Cohen\'s d, and a value of d = 0.60 is obtained. Based on this information, what is the mean for the treated sample? Solution cohen\'s d=(mean-80)/10 required mean=6+80=86.