STA3032 Quiz 9 - were downgraded and 40 were scrap. Can you...

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NAME (in CAPITALS): UFID Section: 7370 / 7393 UNIVERSITY OF FLORIDA DEPARTMENT OF STATISTICS STA3032 QUIZ 9 Spring 2011 Problem 1 on page 466 (Section 6.10) Fasteners are manufactured for an application involving aircraft. Each fastener is categorized either as conforming, downgraded or scrap. It is thought that 85% of all fasteners are conforming, 10% are downgraded and 5% are scrap. In a random sample of 500 fasteners, 405 were conforming, 55
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Unformatted text preview: were downgraded and 40 were scrap. Can you conclude that the true percentages differ from 85%, 10% and 5%? a) State the appropriate null hypothesis. b) {NEW} Are the assumptions of the test satisfied? Explain. c) Compute the expected frequencies under the null hypothesis. d) Find the calculated value of the test statistic. e) Find the p-value of the test. f) What is your decision? g) What is your conclusion?...
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This note was uploaded on 06/07/2011 for the course STA 3032 taught by Professor Kyung during the Spring '08 term at University of Florida.

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STA3032 Quiz 9 - were downgraded and 40 were scrap. Can you...

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