Question

A researcher is evaluating whether a new intervention affects the average reported anxiety symptoms in a sample of 64 college students. A survey from the previous semester found that the population reported a mean anxiety score of 38 with a standard deviation of 9. The sample completes the same measure of anxiety, with an average score of 50. The researcher sets their alpha level at .05 and performs a two-tailed test to determine whether anxiety increases or decreases after the intervention. Calculate standard error for this study.

Answer 1