2- In a diabetes study on 140 diabetic patients, 25% had uncontrolled blood glucose level. Construct the 95% CI for the population proportion.

3- Twenty-four users attempted to add a channel on their cable TV to a list of favorites. After the task, they rated the difficulty on the 7 point Single Ease Question. Compute a 95 percent confidence interval. What does this tell us? Responses are shown below 4.5 22 7 14.5 9 9 3.5 8 11 7.5 18 20 7.5 9 10.5 15 19 2.5 5 9 8.5 14 20 8