A Sample Is Selected from a Population with μ =

Multiple Choice

A sample is selected from a population with μ = 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.