An engineer at an electric scooter company is testing the tire life of the tires on their scooters. The company advertised the scooters as having wheels that lasted for 500 miles. The engineer suspects the tires last far less. He takes a sample of the scooters to determine if their average tire life is less than 500 miles. What are the appropriate hypotheses for this test? Average tire life = (ATL) H0: ATL = 500 miles, Ha: ATL > 500 miles H0: ATL > 500 miles, Ha: ATL = 500 miles H0: ATL = 500 miles, Ha: ATL < 500 miles