This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: interval for the true population proportion. What do we know? Example, cont’d. 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, cont’d. • What do we know? You try one… • You try one: – Try #12 page 382. 2/26/2008 5...
View
Full Document
 Spring '08
 Moore
 researcher, true population proportion

Click to edit the document details