Assume the following for a paired-samples t test: N = 12, M_difference = 467.82, s = 280.50.What is the size of the effect? A) small B) medium C) large D) no effect

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To determine the effect size, we can use Cohen's d formula. d = (mean difference between pairs) / (standard deviation of differences) First, we need to find the mean difference between pairs: Mean difference = M_difference / N Mean difference = 467.82 / 12 Mean difference = 38.99 Next, we need to find the standard deviation of differences, which is given as s = 280.50. d = 38.99 / 280.50 d = 0.139 A Cohen's d of 0.139 is considered a large effect size according to commonly used interpretations.

Assume the Following for a Paired-Samples T Test: N =