For car speeds the mean speed record it was 77.83 mph with a standard deviation of 5.27 mph to see how many cars are speeding john subtract 37 mph from all speeds

1. what is the mean and standard deviation now what does this tell us about the speed of the cars

2. his friend in berlin wants to study the speed so john convert all the original miles per hour readings to kilometers per hour by multiplying or speeds by 1.609 (km per mile) what is the mean and standard deviation now