test question

Do you tailgate the car in front of you? About 45% 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 10 vehicles. USE SALT (a) Let r be the number of vehicles that tailgate before passing. Make a histogram showing the probability distribution of rfor r = 0 through r = 10. 0.25 0-35 0.3 0.5 ~ 0.2 Pm Pm 0.15 0.1 0.05 0.05 012345678910 012345678910 0 ' O ' 0.5 0.2 \"\"015 0.1 0.05 012345670910 012345678910 0 ' O ' P1!) (b) Compute the expected number of vehicles out of 10 that will tailgate. vehicles (c) Compute the standard deviation of this distribution. (Round your answer to two decimal places.) vehicles