Question: 32 How large a sample size is needed to estimate the mean annual income of Native Ameri- cans correct to within $1000 with probability .99

32 How large a sample size is needed to estimate the mean annual income of Native Ameri- cans correct to within $1000 with probability .99 Suppose there is no prior information about the standard deviation of annual income of Native Americans, but we guess that about 95% of their incomes are between $6000 and $50,000 and that this distribution of incomes is approximately mound shaped.

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