You are planning a study to determine whether local student athletes in high school watch more or less TV per week than other Atlanta/area high schoolers. You need to decide what effect size, significance level, and sample size to use for your study. you want to conduct a statistically strong study, but you also need to be realistic in terms of getting the project done before the end of the semester. you decide to use a two- tailed test, aiming for 80% power. your answer should reflect the total sample size with both groups added together.

How large a sample will you need for a large effect size at a=.01