Question: An entrepreneur wants to open an appliance repair shop She
An entrepreneur wants to open an appliance repair shop. She would like to know about what the average home repair bill is, including the charge for the service call for appliance repair in the area. She wants the estimate to be within $20 of the actual figure. She believes the range of such bills is between $30 and $600. How large a sample should the entrepreneur take if she wants to be 95% confident of the results?
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