Question

The average age of all licensed drivers in a county is 42.60 with a standard deviation of 12 , and the distribution is approximately normal. A county police officer was interested in whether the average age of drivers receiving speeding tickets differed from the average age of the driving population in the county. She obtained a sample of N=16 drivers receiving speeding tickets. The average age for this sample was M=34.40. Perform ALL of the steps of hypothesis testing necessary to determine whether this group differs from the population of drivers in the county.