2par would like s par ace to demonstrate that their

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: – μAce d = x Par - x Ace = 17 σ= d z2 α σ2 σ 2 1 2 n 1 + n2 σ2 σ 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 standard error for the difference between the 2 population means? Hypothesis Tests Par, Inc. is a manufacturer of golf s 12 s 2 2 equipment= σ d and has developed a new + n1 been designed to golf ball that has n 2 2 provide “extra sdistance.” 2Par would like s Par = + Ace to demonstrate that their new Par golf n Par n Ace balls are superior to the comparable 2 ball made by their 20 2 = 15 + competitor, Ace, Inc. 120 80 In a test of driving distance using a = 2.622 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 inte...
View Full Document

This document was uploaded on 03/05/2014.

Ask a homework question - tutors are online