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Unformatted text preview: 179 Exercise 11.49: REVIEW QUESTION 12 (Solution on p. 184.) Find the 95% confidence interval for the true average checking account balance of a twenty-year- old college student. Exercise 11.50: REVIEW QUESTION 13 (Solution on p. 184.) What type of data is the balance of the checking account considered to be? Exercise 11.51: REVIEW QUESTION 14 (Solution on p. 184.) What type of data is the number of 20 year olds considered to be? Exercise 11.52: REVIEW QUESTION 15 (Solution on p. 184.) On average, a busy emergency room gets a patient with a shotgun wound about once per week. We are interested in the number of patients with a shotgun wound the emergency room gets per 28 days. a. Define the random variable X . b. State the distribution for X . c. Find the probability that the emergency room gets no patients with shotgun wounds in the next 28 days. The next two questions refer to the following information: The probability that a certain slot machine will pay back money when a quarter is inserted is 0.30 . Assume that each play of the slot machine is independent from each other. A person puts in 15 quarters for 15 plays. Exercise 11.53: REVIEW QUESTION 16 REVIEW QUESTION 16 Removed Exercise 11.54: REVIEW QUESTION 17 (Solution on p. 184.) Is it likely that exactly 8 of the 15 plays would pay back money? Justify your answer numerically.Is it likely that exactly 8 of the 15 plays would pay back money?...
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- Fall '08