Homework_9_Answer_Key - , ,La 1 4'UU S pring 2009 H omework...

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, ,,La 1 4'UU Spring 2009 Homework 9 Answer liey 1a0l0, ao. 30%) qr./, CI . \ t33 de are 95% mnSident +hat :She above in+erml contains +he population mean tip percentage. a)n) Minimum ~ondi+ions: np" - (1500)10.53)= 795 25 nLl-p') = (1500)(~.~7) = 705 5
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bl Hinimum conditions: np^ = 11500)(0.31)= Y65.s 5 nL\-F)= nsoo)lo.69) = 1035 2 5 C) Minim condi+ions: np" = 11500)L0.05) = 75% 5 rill-p)= (1500)L0.95) = Ill252 5
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c31 aa)d fie mrgin of errm is greates+ br [a\ and least for (c), u~ith (bl kalling in behueen. Part La) has +he larges4 margin error because the value OF is closes4 0.5. la 3) = 93/100= 0.83 . Minimum conditions : np^ = 1100)10.83) = 83 5 5 nLI-$) = llOO)(O.17) = 17 5- 5 Ell, "/id = loo/9a~3 = 0.01 a L 0.05 -, ignore FPC [il =?JF = 0.0376
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C37 c) The conSidence interval computed in [a) is more narrow than the conhdence interval cornpu-led in (b). A population size Peguiring use ot he Finite PopuIahon Correch-cm $actor yields a smaller sampling erco r.
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C1'1 Lob) CI di&h = a0 = am.0353) = 0.0706 No, do~b\in\;ng n only reduces +he wid4-h to 0.0706. C3I bl We are 80% con$idenS +ha+ above inkr~a\ ~ntains the population propor-kion 0% eonsumen who \ike
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This note was uploaded on 08/25/2010 for the course AEM 2100 taught by Professor Vanes,c. during the Spring '08 term at Cornell University (Engineering School).

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Homework_9_Answer_Key - , ,La 1 4'UU S pring 2009 H omework...

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