Question

Do you tailgate the car in front of you? About 30% of all drivers will tailgate before passing, thinking they can make the car in front of them go faster. Suppose that you are driving a considerable distance on a two-lane highway and are passed by 7 vehicles.

(a) Let *r* be the number of vehicles that tailgate
before passing. Make a histogram showing the probability
distribution of *r* for *r* = 0 through *r* =
7.

(b) Compute the expected number of vehicles out of 7 that will tailgate. (Round your answer to two decimal places.)

c) Compute the standard deviation of this distribution. (Round your answer to two decimal places.)

Answer #1

Do you tailgate the car in front of you? About 25% of all
drivers will tailgate before passing, thinking they can make the
car in front of them go faster. Suppose that you are driving a
considerable distance on a two-lane highway and are passed by 9
vehicles.
(a) Let r be the number of vehicles that tailgate
before passing. Make a histogram showing the probability
distribution of r for r = 0 through r =
9.
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