2. Oneâ€Sample Univariate Hypothesis Testing with Proportions
For this question, show the results “by handâ€, but you can use Rto check your work. Suppose that the 4â€year graduation rate at alarge, public university is 70 percent (this is the populationproportion of successes). In an effort to increase graduationrates, the university randomly selected 200 incoming freshman toparticipate in a peerâ€advising program. After 4 years, 154 of thesestudents graduated. What are the null and alternative hypotheses?Can you conclude that this program was a success at the 5â€percentlevel of significance? Can you conclude that the program is asuccess at the 1â€percent level of significance? Show your work andexplain. Since “success†is an increase in graduation rates, thisis a oneâ€tailed test.
