Confidence interval for population proportion

Reference no: EM13977689

1. According to a National Organization for Youth Safety Survey of 605 drivers aged 16-20, 68% have sent a text message while driving. Assuming this to be a simple random sample of drivers from this age group, construct and interpret the 90% confidence interval for the population proportion of drivers aged 16-20 who have texted while driving. Source: Anne R. Carey and Karl Gelles, "Young Drivers Busy

Behind the Wheel," USA Today, June 16, 2009, p. 1A.

2. A Zogby poll found that 75% of Americans can name all of The Three Stooges-Moe, Curly, and Larry. Assuming this finding to be based on a simple random sample of 1200 Americans, construct and interpret the 95% confidence interval for the population proportion of Americans who can name all three Stooges. Source: Brit Hume, "Zogby Poll: Most Americans Can Name Three Stooges, But Not Three Branches of Government," foxnews.com, August 15, 2006.

Reference no: EM13977689

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