2.4-9. Suppose that the percentage of American drivers who are multitaskers (e.g., talk on cell phones, eat a snack, or

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2 4 9 Suppose That The Percentage Of American Drivers Who Are Multitaskers E G Talk On Cell Phones Eat A Snack Or 1 (48.8 KiB) Viewed 104 times

2.4-9. Suppose that the percentage of American drivers who are multitaskers (e.g., talk on cell phones, eat a snack, or text message at the same time they are driv- ing) is approximately 80%. In a random sample of n = 20 drivers, let X equal the number of multitaskers. (a) How is X distributed? (b) Give the values of the mean, variance, and standard deviation of X. (e) Find the following probabilities: (i) P(X 15), (ii) P(X > 15), and (iii) P(X < 15).