Suppose that you have read the following sentence in a psychology journal: “The experimental group obtained a higher score on the recall task (M = 14.7) than did the control group (M = 11.1), and this difference was statistically significant, t(38) = 2.3, p < .05.” Assuming that the two samples are the same size:

(a) Find the 95% CI for the difference of the means.

(b) Find g, the size of the effect in the sample data.