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In a simple random sample of 1180 U.S. adults from a large population, it is found...

In a simple random sample of 1180 U.S. adults from a large population, it is found that 816 “regularly” spend more than 40 minutes per day checking email. Use this sample to estimate the true percentage, p, of all U.S. adults in this population who “regularly” spend more than 40 minutes per day checking email.In each question below, give answers as percents, rounded to at least two decimal places.

(a) Find a 95% confidence interval for p

% < p < %

(b) Find a 90% confidence interval for p

% < p < %

(c) Find a 99% confidence interval for p

% < p < %

Math   Statistics-And-Probability   
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