​A Sample Is Selected from a Population with μ =

question 38

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,the size of the treatment effect,as measured by Cohen's d,is ____.

• A)d = 0.125​
• B)​d = 0.25
• C)​d = 0.50
• D)​d=0.001

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