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Fast-Food Bills for Drive-Thru Customers A random sample of 42 cars in the drive-thru of a popular fast food restaurant revealed an average bill of

Fast-Food Bills for Drive-Thru Customers A random sample of 42 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $17.56 per car. The population standard deviation is $5.64. Estimate the mean bill for all cars from the drive-thru with 91% confidence, Round intermediate and final answers to two decimal places.

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