driving device a sample of Par golf balls was compared with a sample of golf

Driving device a sample of par golf balls was

This preview shows page 3 - 6 out of 9 pages.

driving device, a sample of Par golf balls was compared with a sample of golf balls made by Rap, Ltd., a competitor. Sample 1, Par, Inc. Sample 2, Rap, Ltd 𝑛𝑛 1 = 120 𝑛𝑛 2 = 80 𝑥𝑥̅ 1 =275 yards 𝑥𝑥̅ 2 =258 yards Based on data from previous driving distance tests, the two population standard deviations are known with 𝜎𝜎 1 = 15 yards and 𝜎𝜎 2 = 20 yards. A) D evelop a 95% confidence interval estimate of the difference between the mean driving distances of the two brands of golf ball, i.e., 𝝁𝝁 𝟏𝟏 𝝁𝝁 𝟐𝟐 B) Can we conclude, using a = .05, that the mean driving distance of Par, Inc. golf balls is greater than the mean driving distance of Rap, Ltd. golf balls?
Image of page 3