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# a researcher wishes to estimate, with 99% confiden5, the population proportion of adults who think the president of their country can control the...

a researcher wishes to estimate, with 99% confiden5, the population proportion of adults who think the president of their country can control the price of gasoline. her estimate must be accurate within 2% of the true 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 22 % of the respondents said they think their president can control the price of gasoline .c.) compare the results from part a and b.