How many families need to survey

Reference no: EM131167428

You are trying to estimate the average amount a family spends on food during a year. In the past the standard deviation of the amount a family has spent on food during a year has been approximately $1000.

If you want to be 99% sure that you have estimated average family food expenditures within $50, how many families do you need to survey?

Reference no: EM131167428

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