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Unformatted text preview: 104 CHAPTER 6. THE NORMAL DISTRIBUTION C. 2.2 D. 7.3 Exercise 6.14 (Solution on p. 107.) What is the probability of spending more than 2 days in recovery? A. 0.0580 B. 0.8447 C. 0.0553 D. 0.9420 Exercise 6.15 (Solution on p. 107.) The 90th percentile for recovery times is? A. 8.89 B. 7.07 C. 7.99 D. 4.32 The questions below refer to the following: The length of time to find a parking space at 9 A.M. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. Exercise 6.16 (Solution on p. 107.) Based upon the above information and numerically justified, would you be surprised if it took less than 1 minute to find a parking space? A. Yes B. No C. Unable to determine Exercise 6.17 (Solution on p. 107.) Find the probability that it takes at least 8 minutes to find a parking space. A. 0.0001 B. 0.9270 C. 0.1862 D. 0.0668 Exercise 6.18 (Solution on p. 107.) Seventy percent of the time, it takes more than how many minutes to find a parking space?...
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