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Unformatted text preview: interval for the true population proportion. What do we know? Example, contd. You try one. You try #4 page 370. 2/26/2008 4 Sample size for proportions Car Phone Ownership: A researcher wishes to estimate the proportion of people who own a home computer. A previous study shows that 40% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proportion. She wants also to be 90% confident. Find the minimum sample size necessary. Example, contd. What do we know? You try one You try one: Try #12 page 382. 2/26/2008 5...
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This note was uploaded on 04/20/2008 for the course BER 345 taught by Professor Moore during the Spring '08 term at Alabama.
 Spring '08
 Moore

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