Example for inferences for two proportions

Example for inferences for two proportions - in the United...

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9.4 Comparing two population proportions: independent sampling Example Independent random samples of 2235 U.S. women and 2065 U.S. men were obtained in order to compare the percentage of women who smoke cigarettes to the percentage of men who smoke cigarettes. Of the women sampled, 503 smoked; of the men sampled, 572 smoked. (a) At the 5% significance level, do the data provide sufficient evidence to conclude that,
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Unformatted text preview: in the United States, the percentage of women who smoke cigarettes is smaller than the percentage of men who smoke cigarettes? (b) Obtain a 90% confidence interval for the difference between the proportions of U.S. women and men who smoke cigarettes....
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This note was uploaded on 09/10/2009 for the course STAT 217 taught by Professor Dan during the Winter '07 term at University of Calgary.

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