You collect a sample of twenty pairs of production counts per hour. You hypothesize that production counts per hour have increased between Time 1 and Time 2. If _D = 15.15 and s_D = 14.357375, what is the standardized effect size? A) 15.15 B) 4.72 C) 1.06 D) 3.21

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Quizplus · Accepted Answer

The standardized effect size (Cohen's d) is calculated as the mean difference divided by the standard deviation of the differences: d = D̄ / sD = 15.15 / 14.357375 ≈ 1.06.

You Collect a Sample of Twenty Pairs of Production Counts