Calculate Cohen's d for t = 4.22 with N = 60 for each of the two groups.

A) .07
B) .39
C) .78
D) 1.11

Question

Calculate Cohen's d for t = 4.22 with N = 60 for each of the two groups.A)  .07B)  .39C)  .78D)  1.11

Yueqi Zhang · Accepted Answer

Final Answer : C, Explanation :   Cohen's d is calculated using the formula   d = t N / 2 d = \frac{t}{\sqrt{N/2}} d = N /2 ​ t ​  . Plugging in the values given,   d = 4.22 60 / 2 = 4.22 30 ≈ 0.77 d = \frac{4.22}{\sqrt{60/2}} = \frac{4.22}{\sqrt{30}} \approx 0.77 d = 60/2 ​ 4.22 ​ = 30 ​ 4.22 ​ ≈ 0.77  , which rounds to .78, making option C correct.

Calculate Cohen's d for t = 4.22 with N = 60 for each of the two groups.

A) .07
B) .39
C) .78
D) 1.11

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