The mean speed of vehicles along a stretch of highway is 56 mph with a standard deviation of 4 mph….

The mean speed of vehicles along a stretch of highway is 56 mph with a standard deviation of 4 mph. You measure the speed of three cars traveling along this stretch of highways as 62 mph, 47 mph, and 56 mph. Find the z-score that corresponds to each speed. Determine which car had a relatively faster speed.

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