1. Pa r, Inc. is a manufacturer of golf equipment and has developed a new golf ball that has been designed to provide "extra distance.\" In a test of driving distance using a mechanical driving device, a sample of Par golf balls was compared with a sample of golf balls made by Rap, Ltd., a competitor {given in the table below]. Also, based on data from previous driving distance tests, the two population standard deviations are known with 51 = 15 yards and 02: 20 varcls. Sample 1: Par Inc. Sample 2: Flap Ltd. Sample Size 120 balls 80 balls Sample Mean 2?5 yards 258 yards