Question: A researcher comparing whether night-shift workers sleep the recommended 8 hours per day showed that workers slept 7.0 1.5 (M SD) hours per

A researcher comparing whether night-shift workers sleep the recommended 8 hours per day showed that workers slept 7.0 ± 1.5 (M ± SD) hours per day. Identify the effect size in this study using estimated Cohen’s d.

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