3. For a sample of 100 honor students at a Colorado university, a sociologist obtained the students\" year in school (i.e., class standing) and their willingness to help the university raise donations. Using the following data, describe the association between class standing and willingness to help raise donations, then test the null hypothesis at the .0] alpha level that Willingness to help raise donations is independent of year in school. M W ' ess to He ? Freshman So homore Junior Senior Willing 15 16 15 15 Unwilling 15 14 5 5