Car speeds again. For the car speed data of Exercise
Chapter 6, Problem 20(choose chapter or problem)
Car speeds again. For the car speed data of Exercise 18,recall that the mean speed recorded was 23.84 mph, witha standard deviation of 3.56 mph. To see how many carsare speeding, John subtracts 20 mph from all speeds.a) What is the mean speed now? What is the new stan-dard deviation?b) His friend in Berlin wants to study the speeds, so Johnconverts all the original miles-per-hour readings tokilometers per hour by multiplying all speeds by 1.609(km per mile). What is the mean now? What is thenew standard deviation?
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