The waiting times (in minutes) of a random sample of 20 people at a bank have a sample standard deviation of 4.4 minutes. Construct a confidence interval for the populationvariance o² and the population standard deviation o. Use a 95% level of confidence. Assume the sample is from a normally distributed population.OC. With 95% confidence, you can say that the population variance is betweenandO A. With 5% confidence, you can say that the population standard deviation isgreater thanminutes.COXWhat is the confidence interval for the population standard deviation o?(Round to one decimal place as needed.)Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.(Round to one decimal place as needed.)OC. With 5% confidence, you can say that the population standard deviation isbetween minutes and minutes.O D. With 5% confidence, you can say that the population variance is less thanOB. With 95% confidence, you can say that the population standard deviation is lessthanminutes.OD. With 95% confidence, you can say that the population standard deviation isbetween and minutes. The waiting times (in minutes) of a random sample of 20 people at a bank have a sample standard deviation of 4.4 minutes. Construct a confidence interval for the populationvariance of and the population standard deviation o. Use a 95% level of confidence. Assume the sample is from a normally distributed population.What is the confidence interval for the population variance o²?(Round to one decimal place as needed.)Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.(Round to one decimal place as needed.)O A. With 95% confidence, you can say that the population variance is greater thanOC. With 95% confidence, you can say that the population variance is betweenandWhat is the confidence interval for the population standard deviation o?OB. With 5% confidence, you can say that the population variance is betweenandO D. With 5% confidence, you can say that the population variance is less than

The sample size is 20 and sample standard deviation is 4.4 minutes.

Answered: The waiting times (in minutes) of a…

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 smaple mean and the population m standard deviation. Use this info to construct the 90% and 95% confidence intervals for the population mean. Interpert the results and compare the widths of the confidence intervals. A random sample of 50 home theater systems has a mean price of $145. Assume the population standard deviation is $17.30
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Determine whether the statement is true or false. If it is false, rewrite it as a true statement. As the size of a sample increases, the standard deviation of the distribution of sample means increases. Choose the correct choice below. C OA. This statement is false. A true statement is, "As the size of a sample increases, the standard deviation of the distribution of sample means decreases." OB. This statement is true. OC. This statement is false. A true statement is, "As the size of a sample decreases, the standard deviation of the distribution of sample means decreases." OD. This statement is false. A true statement is, "As the size of a sample increases, the standard deviation of the distribution of sample means does not change." Time Remaining: 01:26:37
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