confidence intervals statistics, statistics homework help

Genetically modified food.

You wish to estimate, with 99% confidence, the populations proportion of the U.S adults who think that foods containing genetically modified ingredients should be labeled. Your estimate must be accurate within 2% 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 87% of U.S adults think that foods containing genetically modified ingredients should be labeled
(c)Compare the results from part (a) and (b)

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confidence intervals statistics, statistics homework help

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