A confidence interval for a population mean has a margin of error of 2.2.a. Determine the length of the confidence interval.b. If the sample mean is 51.7, obtain the confidence interval.c. Construct a graph that illustrates your results.a. The length of the confidence interval is.(Type an integer or a decimal. Do not round.)

Answered: A confidence interval for a population…

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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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 60 home theater systems has a mean price of $110.00. Assume the population standard deviation is $17.20. Construct a 90% confidence interval for the population mean. The 90% confidence interval is ( (Round to two decimal places as needed.)
Need to solve for 95% interval and 90% interval
Construct the confidence interval for the population mean.
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 $117.00.Assume the population standard deviation is $18.40.
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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 45 home theater systems has a mean price of $114.00. Assume the population standard deviation is $15.10. Construct a 90% confidence interval for the population mean. The 90% confidence interval is (\,\ (Round to two decimal places as needed.)
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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. 10. A random sample of 40 home theater systems has a mean price of $126.00. Assume the population standard deviation is $16.70. Construct a 90% confidence interval for the population mean. The 90% confidence interval is (nothing,nothing)
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