A sample of n = 9 college students is used to evaluate the effectiveness of a new study skills Workshop. Each student's grade point average is recorded for the semester before workshop and for the...

A sample of n = 9 college students is used to evaluate the effectiveness of a new study skills Workshop. Each student's grade point average is recorded for the semester before workshop and for the semester after the workshop. Average GPA improved by Md = .60 points with S2 = 0.09. The researcher would like to use the sample to estimate how much effect the workshop would have for the entire college population.Compute the 80% confidence interval. Report each of the intervals to the thousandths