Question: The effect size for independent groups, d, can be calculated by: (a) (mean 1 mean 2) mean SD (b) (mean 1 + mean

The effect size for independent groups,

d, can be calculated by:

(a) (mean 1 − mean 2) ÷ mean SD

(b) (mean 1 + mean 2) ÷ mean SD

(c) (mean 1 − mean 2) ÷ SEM

(d) (mean 1 + mean 2) ÷ SEM

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