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90% and 99% Confidence interval for HMO example

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A random sample of 19 HMO's was selected. For each HMO the co-payment for a doctors office visit was recorded. The results were...
In dollars,
9,10, 11, 10, 7, 6, 5, 12, 11, 10, 12, 8, 7, 6, 11, 6, 8

Under the assumption that co payment amounts are normally distributed, find a 99% confidence interval for the mean amount in dollars.

Round to 1 decimal place.

What is the lower limit of the 90% confidence interval?

What is the upper limit of the 90% confidence interval?

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The solution gives step-by-step instructions on how to calculate a 90% and a 99% confidence interval.

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PROBLEM:
A random sample of 19 HMO's was selected. For each HMO the co-payment for a doctor's office visit was recorded. The results were...
In dollars, 9,10, 11, 10, 7, 6, 5, 12, 11, 10, 12, 8, 7, 6, 11, 6, 8

Under the assumption that co payment amounts are normally distributed, find a 99% confidence interval for the mean amount in dollars.

Round to 1 decimal place.

What is the lower limit of the 90% ...

Purchase this Solution
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