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QUESTION
Statistics
In a certain city, a man recorded the speeds of cars driving past his house, where the speed limit sign read 20 mph. The mean of 100 readings was
22.16
mph, with a standard deviation of
3.62
mph. One car's z-score was
negative 1.9
How fast was that car going?
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******************************************* 0362*-19)+226= 214722 ***