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2011-10-02 22-26-41 38

2011-10-02 22-26-41 38 - Vfifi l l(E How to use(eq8.3 W...

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Unformatted text preview: Vfifi l l (E) How to use (eq8.3) W EX 4 A company wants to determine the frequency of occurrence of invoices error. Suppose (0 that in a sample of 100 sales invoices, 10 contain errors. Construct a 90% confidence variant} interval for the true proportion of error. .9 “PM? Wzfld—L‘erd chi—cad). mm WM.“ a _ . ‘ we mots; gmg “900 “V'QOZ ‘ Wu. Hue. \Oibfofion “6:130 C. ‘fiCQQ I?” bit. Wan .5_0\o~/_ r; d“. 2‘; W ,7 9i d~ - 23,59; g?) AtlkoH‘SWD _ ‘ lo 6:0qu 0 : "+ ““3"“ .\-.0H<N 33$ .obolo U'l" I“ t W @Out of 268 interviewed, 83 people said that they would buy a certain product. Use a. 95% confidence interval to estimate the true proportion of the customer who would buy the roduct. '- - — . p MIL $358 ‘59 (max = Ole] Set-090.61. CL \- aflqs - oin : wee <35 *3 8;. % £7: Lee 330% g 50%?- ..-um--i.-.‘.___-‘_ _'______- _ .7. _‘ ‘- Z L m: - ; - .= ...
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