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A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) televisions. The article states that 14 randomly selected 32-inch LCD televisions have a sample standard deviation of $3.43. Assume the sample is taken from a normally distributed population. Construct 80% confidence intervals for (a) the population variance o2 and (b) the population standard deviation g Interpret the results. (a) The confidence interval for the population variance is ( ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 20% confidence, you can say that the population variance is less than O B. With 20% confidence, you can say that the population variance is between and O C. With 80% confidence, you can say that the population variance is between O D. With 80% confidence, you can say that the population variance is greater than and (b) The confidence interval for the population standard deviation is ( . ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 80% confidence, you can say that the population standard deviation is less than O B. With 80% confidence, you can say that the population standard deviation is between and dollars per year. dollars per year. O C. With 20% confidence, you can say that the population standard deviation is between and O D. With 20% confidence, you can say that the population standard deviation is greater than dollars per year. dollars per year.

A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) televisions. The article states that 14 randomly selected 32-inch LCD televisions have a sample standard deviation of $3.43. Assume the sample is taken from a normally distributed population. Construct 80% confidence intervals for (a) the population variance o2 and (b) the population standard deviation g Interpret the results. (a) The confidence interval for the population variance is ( ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 20% confidence, you can say that the population variance is less than O B. With 20% confidence, you can say that the population variance is between and O C. With 80% confidence, you can say that the population variance is between O D. With 80% confidence, you can say that the population variance is greater than and (b) The confidence interval for the population standard deviation is ( . ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 80% confidence, you can say that the population standard deviation is less than O B. With 80% confidence, you can say that the population standard deviation is between and dollars per year. dollars per year. O C. With 20% confidence, you can say that the population standard deviation is between and O D. With 20% confidence, you can say that the population standard deviation is greater than dollars per year. dollars per year.

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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A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) televisions. The article states that 14 randomly selected 32-inch LCD televisions have a sample standard deviation of $3.43. Assume the sample is taken from a normally distributed population. Construct 80% confidence intervals for (a) the population variance o² and (b) the population standard deviation g. Interpret the results. (a) The confidence interval for the population variance is ( ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 20% confidence, you can say that the population variance is less than O B. With 20% confidence, you can say that the population variance is between and O C. With 80% confidence, you can say that the population variance is between and. O D. With 80% confidence, you can say that the population variance is greater than (b) The confidence interval for the population standard deviation is ( . ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 80% confidence, you can say that the population standard deviation is less than O B. With 80% confidence, you can say that the population standard deviation is between and dollars per year. dollars per year. O C. With 20% confidence, you can say that the population standard deviation is between and O D. With 20% confidence, you can say that the population standard deviation is greater than dollars per year. dollars per year.
Transcribed Image Text:A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) televisions. The article states that 14 randomly selected 32-inch LCD televisions have a sample standard deviation of $3.43. Assume the sample is taken from a normally distributed population. Construct 80% confidence intervals for (a) the population variance o² and (b) the population standard deviation g. Interpret the results. (a) The confidence interval for the population variance is ( ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 20% confidence, you can say that the population variance is less than O B. With 20% confidence, you can say that the population variance is between and O C. With 80% confidence, you can say that the population variance is between and. O D. With 80% confidence, you can say that the population variance is greater than (b) The confidence interval for the population standard deviation is ( . ). (Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A. With 80% confidence, you can say that the population standard deviation is less than O B. With 80% confidence, you can say that the population standard deviation is between and dollars per year. dollars per year. O C. With 20% confidence, you can say that the population standard deviation is between and O D. With 20% confidence, you can say that the population standard deviation is greater than dollars per year. dollars per year.
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