For D how do you calculate the EBM?

106. Suppose that a committee is studying whether or not there is waste of time in our judicial system. It is interested in the mean amount of time individuals waste at the courthouse waiting to be called for jury duty. The committee randomly surveyed 81 people who recently served as jurors. The sample mean wait time was eight hours with a sample standard deviation of four hours. a. i. x _ = 8hrs ii. sx = 4hrs iii. n: 81 iv. n 1 = 80 b. Define the random variables X and X _ in words. c. Which distribution should you use for this problem? Explain your choice. d. Construct a 95% confidence interval for the population mean time wasted. i. State the confidence interval. ii. Sketch the graph. iii. Calculate the error bound. e. Explain in a complete sentence what the confidence interval means. B. X = the number of hours a person wastes while waiting to be called for service. X bar: the average number of hours wasted for people in the sample C. I would definitely use the standard normal distribution, because the value of n isn't big enough. D. = 8 i 1.96 (4N81) = 8 i 0.8711 (7.12, 8.88) EBM = Zor/2 x em = 1.96 (411/81) 2 0.88