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OpenStudy (anonymous):
A researcher selects a sample from a population with m = 30 and uses the sample to evaluate the effect of a treatment. After treatment, the sample has a mean of M = 32 and a variance of s2= 6. If cohens d is used to measure the size of the treatment effect, which of the following would NOT have effect on the cohen d value? Increase the number of individuals in the sample Increase the sample mean Decrease the sample variance All of the other options will increase the likelihood of rejecting the null hypothesis.
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