Elementary Statistics Written Homework Unit 3B: Sections 4.4, 4.5, & 5.1 Software output is required for this assignment. 1. Choose an appropriate procedure. For each of the following, indicate whether you would use a hypothesis test or a confidence interval. Then state hypotheses if you would use a hypothesis test, or indicate the parameter(s) using correct notation if you would use a confidence interval. You do not need to carry out any procedures or define the parameters. a. To estimate the proportion of all grocery store trips in which whole milk is purchased, based on a sample of grocery receipts, you would use a (check one): O Hypothesis test with hypotheses: Confidence interval for the parameter(s) - notation only: b. The EPA estimates fuel mileage for a particular new car to be 34 mpg on the highway. To determine whether the actual fuel mileage is different from the EPA estimate based on a sample of highway drives, you would use a (check one): O Hypothesis test with hypotheses: Confidence interval for the parameter(s) - notation only: c. Researchers divide subjects into treatment and control groups, and give a weight loss drug the treatment group and a placebo to the control group. For both groups, they record weight change (After - Before) over two weeks. To determine whether the drug causes any amount of weight loss, you would use a (check one): O Hypothesis test with hypotheses: Confidence interval for the parameter(s) - notation only: 2. 4.146 Weight Loss Program. Suppose that a weight loss company advertises that people using its program lose an average of 8 pounds the first month, and that the Federal Trade Commission is gathering evidence to see if this advertising claim is inaccurate. Suppose that a 99% confidence interval for the average weight loss during the first month in the program, in pounds, is (7.92, 7.98), based on a large sample of patrons. a. How strong is the statistical significance in the claim that on average people in fact lose less than 8 pounds? b. Practical significance has to do with the magnitude and importance of a result. Consider whether customers would be outraged that the true average weight loss is in fact less than 8 pounds but is within the given interval, and comment on the practical significance of this result