University officials hope that changes they have made have improved the retention rate. Last year, a sample of 1999 freshmen showed that 1563 returned as sophomores. This year, 1669 of 2065 freshmen sampled returned as sophomores. Determine if there is sufficient evidence at the 0.05 level to say that the retention rate has improved. Let last year's freshmen be Population 1 and let this year's freshmen be Population 2. Step 3 of 3 : Draw a conclusion and interpret the decision. Answer Tables Keypad Keyboard Shortcuts We reject the null hypothesis and conclude that there is insufficient evidence at a 0.05 level of significance to support the university's claim that the retention rate has O improved since last year. O We reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance to support the university's claim that the retention rate has improved since last year. O We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.05 level of significance to support the university's claim that the retention rate has improved since last year. wim failto scuffiriont muidenen - ann5 lnualna rianificant claim that intention Submit