SOLUTION: A random sample of 47 cars in the drive thru of a popular fast food restaurant revealed an average bill of $17.92 per car. The population standard deviation is $6.35. Estimate the

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Question 1081973: A random sample of 47 cars in the drive thru of a popular fast food restaurant revealed an average bill of $17.92 per car. The population standard deviation is $6.35. Estimate the mean bill for all cars from the drive thru with 96% confidence. Round your answers to two decimal places.
$_______ < u < $___________
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A random sample of 47 cars in the drive thru of a popular fast food restaurant revealed an average bill of $17.92 per car. The population standard deviation is $6.35. Estimate the mean bill for all cars from the drive thru with 96% confidence. Round your answers to two decimal places.
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sample mean:: 17.92
ME = z*s/sqrt(n) = 1.8807*6.35/sqrt(47) = 1.7421
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96% CI:: 17.92-1.7421 < u < 17.92+1.7421
$16.18 < u < $19.66
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Cheers,
Stan H.
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