Question
1.Suppose that in a random sample of 250 voters, 142 plan to vote for a particular candidate.For each question below, write your answer as a
1.Suppose that in a random sample of 250 voters, 142 plan to vote for a particular candidate.For each question below, write your answer as a decimal, rounding to three places as necessary.
(a) Find a point estimate for p, the population proportion of all voters who plan to vote for the candidate.
(b)Construct a 90% confidence interval for the population proportion of voters who plan to vote for the candidate.
(c) What sample size is needed so that a 95% confidence interval has a margin of error of 0.04?Use the preliminary estimate given in this problem.
(d)What sample size is needed so that a 95% confidence interval has a margin of error of 0.04?Assume no preliminary estimate was available.
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Income Tax Fundamentals 2013
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
31st Edition
1111972516, 978-1285586618, 1285586611, 978-1285613109, 978-1111972516
