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In a random sample of six mobile devices, the mean repair cost was $65.00 and the standard deviation was $13.50. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean μ is (.). (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. OA. If a large sample of mobile devices are taken approximately 90% of them will have repair costs between the bounds of the confidence interval. OB. With 90% confidence, it can be said that the repair cost is between the bounds of the confidence interval. OC. With 90% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval. OD. It can be said that 90% of mobile devices have a repair cost between the bounds of the confidence interval.

In a random sample of six mobile devices, the mean repair cost was $65.00 and the standard deviation was $13.50. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean μ is (.). (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. OA. If a large sample of mobile devices are taken approximately 90% of them will have repair costs between the bounds of the confidence interval. OB. With 90% confidence, it can be said that the repair cost is between the bounds of the confidence interval. OC. With 90% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval. OD. It can be said that 90% of mobile devices have a repair cost between the bounds of the confidence interval.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In a random sample of six mobile devices, the mean repair cost was $65.00 and the standard deviation was $13.50. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean μ is (.). (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. OA. If a large sample of mobile devices are taken approximately 90% of them will have repair costs between the bounds of the confidence interval. OB. With 90% confidence, it can be said that the repair cost is between the bounds of the confidence interval. OC. With 90% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval. OD. It can be said that 90% of mobile devices have a repair cost between the bounds of the confidence interval.
Transcribed Image Text:In a random sample of six mobile devices, the mean repair cost was $65.00 and the standard deviation was $13.50. Assume the population is normally distributed and use a t-distribution to find the margin of error and construct a 90% confidence interval for the population mean. Interpret the results. The 90% confidence interval for the population mean μ is (.). (Round to two decimal places as needed.) The margin of error is $ (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. OA. If a large sample of mobile devices are taken approximately 90% of them will have repair costs between the bounds of the confidence interval. OB. With 90% confidence, it can be said that the repair cost is between the bounds of the confidence interval. OC. With 90% confidence, it can be said that the population mean repair cost is between the bounds of the confidence interval. OD. It can be said that 90% of mobile devices have a repair cost between the bounds of the confidence interval.
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