You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. A random sample of 40 home theater systems has a mean price of $142.00. Assume the population standard deviation is $18.70. ine 90% confidence interval is (.). (Round to two decimal places as needed.) Construct a 95% confidence interval for the population mean. The 95% confidence interval is (.). (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. ○ A. With 90% confidence, it can be said that the sample mean price lies in the first interval. With 95% confidence, it can be said that the sample mean price lies in the second interval. The 95% confidence interval is wider than the 90%. ○ B. With 90% confidence, it can be said that the population mean price lies in the first interval. With 95% confidence, it can be said that the population mean price lies in the second interval. The 95% confidence interval is narrower than the 90%. ○ C. With 90% confidence, it can be said that the population mean price lies in the first interval. With 95% confidence, it can be said that the population mean price lies in the second interval. The 95% confidence interval is wider than the 90%
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. A random sample of 40 home theater systems has a mean price of $142.00. Assume the population standard deviation is $18.70. ine 90% confidence interval is (.). (Round to two decimal places as needed.) Construct a 95% confidence interval for the population mean. The 95% confidence interval is (.). (Round to two decimal places as needed.) Interpret the results. Choose the correct answer below. ○ A. With 90% confidence, it can be said that the sample mean price lies in the first interval. With 95% confidence, it can be said that the sample mean price lies in the second interval. The 95% confidence interval is wider than the 90%. ○ B. With 90% confidence, it can be said that the population mean price lies in the first interval. With 95% confidence, it can be said that the population mean price lies in the second interval. The 95% confidence interval is narrower than the 90%. ○ C. With 90% confidence, it can be said that the population mean price lies in the first interval. With 95% confidence, it can be said that the population mean price lies in the second interval. The 95% confidence interval is wider than the 90%
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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Transcribed Image Text:You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret
the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.
A random sample of 40 home theater systems has a mean price of $142.00. Assume the population standard deviation is $18.70.
ine 90% confidence interval is (.).
(Round to two decimal places as needed.)
Construct a 95% confidence interval for the population mean.
The 95% confidence interval is (.).
(Round to two decimal places as needed.)
Interpret the results. Choose the correct answer below.
○ A. With 90% confidence, it can be said that the sample mean price lies in the first interval. With 95% confidence, it can be said that the sample mean price lies in the second
interval. The 95% confidence interval is wider than the 90%.
○ B. With 90% confidence, it can be said that the population mean price lies in the first interval. With 95% confidence, it can be said that the population mean price lies in the
second interval. The 95% confidence interval is narrower than the 90%.
○ C. With 90% confidence, it can be said that the population mean price lies in the first interval. With 95% confidence, it can be said that the population mean price lies in the
second interval. The 95% confidence interval is wider than the 90%
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