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Mathematics, 28.12.2019 00:31 noah12345678
You wish to estimate, with 95% confidence, the population proportion of u. s. adults who think that the president can do a lot about the price of gasoline. your estimate must be accurate within 4% of the population proportion. (a) no preliminary estimate is available. find the minimum sample size needed. (b) find the minimum sample size needed, using a prior study that found that 48% of u. s. adults think the president can do a lot about the price of gasoline. (source: cbs news/new york times poll) (c) compare the results from parts (a) and (b).
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