At a certain large, metropolitan police department, records of drivers were examined of all those who had

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At a certain large, metropolitan police department, records of drivers were examined of all those who had been stopped because of erratic driving and/or having been involved in an accident. When alcohol was suspected, they were given field sobriety tests, and of those who failed the field test, breathalyzer readings were then taken and recorded. Over a four-year period, the mean reading was .06 with a standard deviation of .02. The mean reading for one male driver who had been driving erratically and also involved in a collision with a highway message board was a .12.

Question: Find the probability of selecting a driver who wasn’t dead and yet could still test out at this level or even higher.

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Basic Statistical Analysis

ISBN: 9781292026824

9th Edition

Authors: Richard C. Sprinthall

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