A random sample of 19 health maintenance organizations (HMOS) was selected. For each HMO, the co- payment (in dollars) for a doctor's office visit was recorded. The results are as follows: 5, 6, 12, 10, 6, 8, 8, 11, 5, 9, 10, 12, 6, 12, 7, 9, 10, 8, 7 Under the assumption that co-payment amounts are normally distributed, find a 95% confidence interval for the mean co-payment amount in dollars. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the confidence interval? What is the upper limit of the confidence Aa interval?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A random sample of 19 health maintenance organizations (HMOS) was selected. For each HMO, the co-
payment (in dollars) for a doctor's office visit was recorded. The results are as follows:
5, 6, 12, 10, 6, 8, 8, 11, 5, 9, 10, 12, 6, 12, 7, 9, 10, 8, 7
Under the assumption that co-payment amounts are normally distributed, find a 95% confidence interval for
the mean co-payment amount in dollars. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to one decimal
place. (If necessary, consult a list of formulas.)
What is the lower limit of the confidence
interval?
What is the upper limit of the confidence
Aa
interval?
Transcribed Image Text:A random sample of 19 health maintenance organizations (HMOS) was selected. For each HMO, the co- payment (in dollars) for a doctor's office visit was recorded. The results are as follows: 5, 6, 12, 10, 6, 8, 8, 11, 5, 9, 10, 12, 6, 12, 7, 9, 10, 8, 7 Under the assumption that co-payment amounts are normally distributed, find a 95% confidence interval for the mean co-payment amount in dollars. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What is the lower limit of the confidence interval? What is the upper limit of the confidence Aa interval?
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