4. A simple random sample Paired T confidence interval: of U.S. adults embarked HD = H1 . H2 : Mean of the difference between Before and After on a program of regular 95% confidence interval results: aerobic exercise. Their Difference Mean Std. Err. DF L. Limit U. Limit heart rates, in beats per minute, were measured Before - After 6.1428571 0.63353022 6 4.5926646 7.6930497 before and aer, with the Differences stored in column, Differences. results at right. a. Verify that the requirements needed to construct this confidence interval were met. A normal probability plot of the difference values is given. b. Find the following: (Give 3 decimal places for C-level and Margin of Error) Confidence Interval Margin of Error Confidence Level = Level of Significance = c. If our sample size was increased (but all other stascs and the C-level are the same), the confidence interval would be. (Circle One) wider narrower Stay the same Cannot be determined d. If our standard deviaon was decreased (but all other stascs and the C-level are the same), the confidence interval would be (Circle One wider narrower Stay the same Cannot be determined e. If our confidence level was decreased (but all the stascs are the same), the confidence interval would be (Circle One) wider narrower Stay the same Cannot be determined MAT 133: Ch. 11 Review WS p.4 5. Inrandomized, double-blind clinical trials of a newvaccine, rats were randomly divided into two groups. Subjects in group 1 received a control vaccine while subjects in group 2 received the new vaccine. Researchers found that 111 of 571 of the subjects in the control group experienced fever as a side effect, while 112 of 448 subjects in the experimental group (group 2) experienced fever as a side effect. a. The above situaon is an example of sampling of a variable. (circle one) Independent; Dependent; Qualitave Quantave Quantave Dependent; Independent; Qualitave b. Fill in the following table with the appropriate values. Control Experimental c. Is there enough evidence to suppo proporon of fever as a side effect 3 of 6 the control group has a lower evel of significance, using the P-value method. (Show all steps and work. Assume all test requirements are met). MAT 133: Ch. 11 Review WS p.5