Compute the Effect Size in a One-Sample T-Test with a Sample

Multiple Choice

Compute the effect size in a one-sample t-test with a sample size of n = 66 and a test statistic of t = 2.27. How is the effect size interpreted based on Cohen's guidelines?

A) 0.28, a small effect
B) 0.38, a medium effect
C) 0.03, a small effect
D) 0.63, a large effect