You collect satisfaction data from 5 clients of Company A and 5 clients of Company B. If x̄₁ = 65.6 , x̄₂ = 42.8, s_p² = 106.25, what is the standardized effect size? A) 22.8 B) 2.21 C) 3.5 D) none of these

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Quizplus · Accepted Answer

The standardized effect size (Cohen's d) is calculated as the difference between the means divided by the pooled standard deviation: d = (x̄1 - x̄2) / s_p = (65.6 - 42.8) / √106.25 = 22.8 / 10.3 ≈ 2.21.

You Collect Satisfaction Data from 5 Clients of Company a and 5