Par would like 275 258 to demonstrate that their new

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2 1 2 n 1 d ±z 2 α + n2 σ2 σ 2 1 2 n 1 + n 2 Example Given these samples, what is the point estimate for the difference between the 2 population means (i.e., for DPar–Ace)? Hypothesis Tests Par, Inc. is a- manufacturer of golf d = x1 x 2 equipment and has developed a new = has been golf ball that x Par - x Ace designed to provide “extra distance.” Par would like = 275 - 258 to demonstrate that their new Par golf = 17 balls are superior to the comparable ball made by their competitor, Ace, Inc. In a test of driving distance using a mechanical driving device, a sample of Par golf balls was compared with a sample of Ace golf balls. In a sample of 120 balls, the Par balls averaged 275 yards and in a sample of 80 balls, the Ace balls averaged 258 yards. Based on data from previous driving distance tests, the two population standard deviations are known with σPar = 15 yards and σAce = 20 yards. Difference Between 2 Population Means parameter point estimator standard error margin of error interval estimate DPar...
View Full Document

Ask a homework question - tutors are online