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An estimate is needed of the mean acreage of farms in a certain city. A 95% confidence interval should have a margin of error of

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An estimate is needed of the mean acreage of farms in a certain city. A 95% confidence interval should have a margin of error of 33 acres. A study ten years ago in this city had a sample standard deviation of 230 acres for farm size. a. About how large a sample of farms is needed? n= (Round up to the nearest integer.)

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