13 Given the recent economic downturn, only 60% in a graduating class of 250 will find employment in the first round of a job search. You have 20 seniors who have recently answered graduated. What is the probability that less than 50% of your seniors will find employment in the first round of a job search? out of 1.0 A. 0.1711 B. 0.0004 question C. -0.9498 D. 0.8289 Select one: O A O B O C O O n 14 Jessica takes a random sample of 25 telecommunications users and constructs a confidence interval for the mean post-paid fees for the prior year. answered Holding all else constant, if she increased the sample size to 30 users, how are the standard error of the mean and the width of the confidence interval affected? out of 1.0 Standard error of the mean Width of confidence interval question A. Increases Becomes wider B. Increases Becomes narrower Decreases Becomes wider D. Decreases Becomes narrower Select one: O A O B O C O D n 15 Which of the following can influence the width of confidence interval? answered I. Standard deviation II. Sample size III. Sample mean out of 1.0 IV. Confidence level question A. I, II, and III B. I, II, and IV C. I, III, and IV D. II and III Select one: O A O B O O D