The mean speed of vehicles along a stretch of highway is 56

Last updated: 7/10/2022

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.