An independent-measures research study with n=5 participants in each treatment produces sample variances of 8 and 1...

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math Statistics-And-Probability

Answer 1

Answer #1

s1² = 8, s2² = 10

n1 = 5, n2 = 5

Pooled variance :

S²p = ((n1-1)*s1² + (n2-1)*s2² )/(n1+n2-2) = ((5-1)*8+ (5-1)*10) / (5+5-2) = 9

Cohen's d = (M1- M2)/√s²p = 2/√9 = 2/3

Option 2nd

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Answer 2

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