A researcher selects a sample from a population with µ = 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 Cohen’s d is used to measure the size of the treatment effect, which of the following would have no effect on the value of Cohen’s d?   Group of answer choices an increased sample size an increased sample mean an increase sample variance Each of these of these aspects will influence the value of Cohen’s d.

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