An economist wants to find a 90 confidence interval for the


Question: An economist wants to find a 90% confidence interval for the mean sale price of houses in a state. How large a sample should she select so that the estimate is within $3500 of the population mean? Assume that the standard deviation for the sale prices of all houses in this state is $31,500.

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Basic Statistics: An economist wants to find a 90 confidence interval for the
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