In a survey of 1018 U.S. adults, 753 say that the energy situation in the United States
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In a survey of 1018 U.S. adults, 753 say that the energy situation in the United States is very or fairly serious.
(a) Find the point estimate for the population proportion.
(b) Construct a 90% confidence interval for the population proportion.
Interpret the results.
(c) Does it seem possible that the population proportion could be between 90% and 95% of the point estimate? Explain.
(d) Find the minimum sample size needed to estimate the population proportion at the 99% confidence level in order to ensure that the estimate is accurate within 4% of the population proportion.
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a 0740 b 0717 0763 With 90 confidence you can say th...View the full answer
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Related Book For 
Elementary Statistics Picturing The World
ISBN: 9781292260464
7th Global Edition
Authors: Betsy Farber, Ron Larson
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