Question

3 Lately, Jude has been feeling a little sad and depressed. He suspects he has been listening to too many sad songs in his extensive iTunes collection. Jude takes a random sample from his thousands of downloaded tunes and classifies ech song as 'Sad' or Not Sad Estimate the population proportion of sad songs in Jude's collection using the following sample. Sad 160 Not Sad 40 Level of Confidence-99% Sploynit (written interpretation) Point Estimate - Critical Value Standard Errors Bound Low s High- 4 Use the data in previous item to test whether the population proportion of sad songs in Jude's iTunes collection is siginificantly more than .74 Test using a-01 Null: Alt: Critical Value Observed Difference_ Standard Errora Calculated Test Statistic outcome (circle one): Reject Null Do Not Reject Null f alpha was.05, would outcome change? YES NO

Answer 1

t Jucle has beex fell g x160 and Sample sike, ns160+10 C.-0.99 1-0-79 lculase: 0

2bo 200 - 0272 v) Bound: 0.0222 2sASg

calculate nell hypotcss P,and

CD obseaved di er ence 0D LOD observed d e O.03I0