Question: 1. In an attempt to decrease drunk driving , police set up vehicle checkpoints during July 4 evening. The police randomly select vehicles to be

1. In an attempt to decrease drunk driving , police set up vehicle checkpoints during July 4 evening. The police randomly select vehicles to be stopped for "informational " checks. On a particular roadway, assume that 20%% of all drivers have a blood alcohol level above the legal limit. For a random sample of 15 vehicles, compute the following probabilities : a All 15 drivers will have a blood alcohol level exceeding the legal limit. b. Exactly 6 of the 15 drivers will exceed the legal limit. c. Of the 15 drivers, 6 or more will exceed the legal limit . d. All 15 drivers will have a blood alcohol level within the legal limit . 2. If the annual precipitation X in a city is a normal variate with a mean of 50 in, and a coefficient of variation (CoV) of 0.2, determine the following : a. The standard deviation of X. b. P(X 60). d. P(40

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