Exercise 2. Calculation of the Standardized Mean Difference, d Homework (Treatment group grades) No homework (Control group

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Exercise 2. Calculation of the Standardized Mean Difference, d Homework (Treatment group grades) No homework (Control group grades)

97 88 88 90 92 91 89 80 78 78 98 92 94 95 79 80 80 95 92 78

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