How large of a sample size do we need to estimate the mean

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How large of a sample size do we need to estimate the mean annual income of Native Americans in Onondaga County, New York, correct within $1000 with probability 0.99? No information is available to us about the standard deviation or their annual income. We know that nearly all of the incomes fall between $0 and $120,000 and that the distribution is approximately bell shaped.

Reference no: EM13634922

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