Use a 90% confidence level instead, and use the traditional approximate CI formula. The article "An Evaluation of Football HelmetsUnder Impact Conditions" (Amer. J. Sports Med.,1984: 233–237) reports that when each footballhelmet in a random sample of 37 suspension-typehelmets was subjected to a certain impact test, 24showed damage. Let p denote the proportion of allhelmets of this type that would show damagewhen tested in the prescribed manner.a. Calculate a 99% CI for p.b. What sample size would be required for thewidth of a 99% CI to be at most .10, irrespec-tive of p?

Solution; Given information: n= 37 Sample size of helmets x= 24 helmets showed damaged…

The article “An Evaluation of Football Helmets Inder Impact Conditions" (Amer. J. Sports Med., 984: 233–237) reports that when each football elmet in a random sample of 37 suspension-type elmets was subjected to a certain impact test, 24 howed damage. Let p denote the proportion of all elmets of this type that would show damage hen tested in the prescribed manner. . Calculate a 99% CI for . What sample size would be required for the width of a 99% CI to be at most .10, irrespec- tive of ôn? р.

The article “An Evaluation of Football Helmets Inder Impact Conditions" (Amer. J. Sports Med., 984: 233–237) reports that when each football elmet in a random sample of 37 suspension-type elmets was subjected to a certain impact test, 24 howed damage. Let p denote the proportion of all elmets of this type that would show damage hen tested in the prescribed manner. . Calculate a 99% CI for . What sample size would be required for the width of a 99% CI to be at most .10, irrespec- tive of ôn? р.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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