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Fast-food bills for drive-thru customers. A random sample of 46 cars in the drive thru of popular fast food restaurants revealed average bill of $17.13

Fast-food bills for drive-thru customers. A random sample of 46 cars in the drive thru of popular fast food restaurants revealed average bill of $17.13 per car. the population standard deviation is $5.16. Estimate the mean bill for all cars from the drive thru with 98% confidence. at least two decimal points

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