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Unformatted text preview: Critical value 1=normsinv(0.01/2)==2.58, critical value 2=2.58 Therefore, decision rule: If Z < 2.58 or Z > 2.58, reject H . Test statistic: ( 29 ( 29 ( 29 ( 29 + = += 260 1 240 1 28 . 72 . 0.8620.567 1 1 1 2 1 2 1 2 1 n n p p p p Z =7.34 Z=(p1p2)(pi1pi2)/ /p(1/p)(1/n1 +1/n2) Decision: Since Z = 7.34 is well below the lower critical bound of 2.58, reject H . There is sufficient evidence to conclude that a significant difference exists in the proportion of males and females who enjoy shopping for clothing....
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 Fall '10
 Zheng

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