46. For the data in the Excel file Freshman College Data, a. use ANOVA to determine whether significant differences exist in the mean retention rate for the different colleges over the four-year period. b. use ANOVA to determine if significant differences exist in the mean ACT scores among the different colleges. c. use ANOVA to determine if significant differences exist in the mean SAT scores among the different colleges.

49. The following cross-tabulation shows the number of people who rated a customer service representative as friendly and polite based on whether the representative greeted them first. a. Write the hypotheses for the chi-square test for independence. b. Find the expected frequencies. c. Compute the chi-square statistic using a level of significance of 0.01. d. Find the chi-square critical value and p-value and draw a conclusion. Friendliness/Politeness Staff Greeting No Yes