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The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 4.7 minutes. Construct a confidence interval for the population variance o² and the population standard deviation o. Use a 90% 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 10% confidence, you can say that the population variance is greater than. O B. With 90% confidence, you can say that the population variance is less than O C. With 90% confidence, you can say that the population variance is between and O D. With 10% confidence, you can say that the population variance is between and What is the confidence interval for the population standard deviation o? OD (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 90% confidence, you can say that the population standard deviation is greater than minutes. O B. With 10% confidence, you can say that the population standard deviation is between minutes and minutes. O C. With 90% confidence, you can say that the population standard deviation is between and minutes O D. With 10% confidence, you can say that the population standard deviation is less than minutes.

The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 4.7 minutes. Construct a confidence interval for the population variance o² and the population standard deviation o. Use a 90% 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 10% confidence, you can say that the population variance is greater than. O B. With 90% confidence, you can say that the population variance is less than O C. With 90% confidence, you can say that the population variance is between and O D. With 10% confidence, you can say that the population variance is between and What is the confidence interval for the population standard deviation o? OD (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 90% confidence, you can say that the population standard deviation is greater than minutes. O B. With 10% confidence, you can say that the population standard deviation is between minutes and minutes. O C. With 90% confidence, you can say that the population standard deviation is between and minutes O D. With 10% confidence, you can say that the population standard deviation is less than minutes.

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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The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 4.7 minutes. Construct a confidence interval for the population variance o? and the population standard deviation o. Use a 90% level of confidence. Assume the sample is from a normally distributed population. What is the confidence interval for the population variance 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.) O A. With 10% confidence, you can say that the population variance is greater than B. With 90% confidence, you can say that the population variance is less than C. With 90% confidence, you can say that the population variance is between and D. With 10% confidence, you can say that the population variance is between and What 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.) O A. With 90% confidence, you can say that the population standard deviation is greater than minutes. B. With 10% confidence, you can say that the population standard deviation is between minutes and minutes. C. With 90% confidence, you can say that the population standard deviation is between and minutes. D. With 10% confidence, you can say that the population standard deviation is less than minutes.
Transcribed Image Text:The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard deviation of 4.7 minutes. Construct a confidence interval for the population variance o? and the population standard deviation o. Use a 90% level of confidence. Assume the sample is from a normally distributed population. What is the confidence interval for the population variance 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.) O A. With 10% confidence, you can say that the population variance is greater than B. With 90% confidence, you can say that the population variance is less than C. With 90% confidence, you can say that the population variance is between and D. With 10% confidence, you can say that the population variance is between and What 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.) O A. With 90% confidence, you can say that the population standard deviation is greater than minutes. B. With 10% confidence, you can say that the population standard deviation is between minutes and minutes. C. With 90% confidence, you can say that the population standard deviation is between and minutes. D. With 10% confidence, you can say that the population standard deviation is less than minutes.
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