are given the sample mean and the population standard deviation. Use this information t O construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths the confidence in n a random sample of 42 business days, the mean closing price of a certain stock was $119.57. Assume the population standard deviation is $10.49. 90% confidence interval is (). und to two decimal places as needed.) 95% confidence interval is (.. und to two decimal places as needed.) ch interval is wider? Choose the correct answer below. The 95% confidence interval The 90% confidence interval "pret the results. A. You can be 90% confident that the population mean price of the stock is outside the bounds of the 90% confidence interval, and 95% confident for the 95% interval. 3. You can be certain that the closing price of the stock was within the 90% confidence interval for approximately 38 of the 42 days, and was within the 95% confidence interval for approximately 40 of the 42 days. C. You can be certain that the population mean price of the stock is either between the lower bounds of the 90% and 95% confidence intervals or the upper bounds of the 90% and 95% confidence intervals. D. You can be 90% confident that the population mean price of the stock is between the bounds of the 90% confidence interval, and 95% confident for the 95% interval.
are given the sample mean and the population standard deviation. Use this information t O construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths the confidence in n a random sample of 42 business days, the mean closing price of a certain stock was $119.57. Assume the population standard deviation is $10.49. 90% confidence interval is (). und to two decimal places as needed.) 95% confidence interval is (.. und to two decimal places as needed.) ch interval is wider? Choose the correct answer below. The 95% confidence interval The 90% confidence interval "pret the results. A. You can be 90% confident that the population mean price of the stock is outside the bounds of the 90% confidence interval, and 95% confident for the 95% interval. 3. You can be certain that the closing price of the stock was within the 90% confidence interval for approximately 38 of the 42 days, and was within the 95% confidence interval for approximately 40 of the 42 days. C. You can be certain that the population mean price of the stock is either between the lower bounds of the 90% and 95% confidence intervals or the upper bounds of the 90% and 95% confidence intervals. D. You can be 90% confident that the population mean price of the stock is between the bounds of the 90% confidence interval, and 95% confident for the 95% interval.
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.
From a random sample of 42 business days, the mean closing price of a certain stock was $119.57. Assume the population standard deviation is $10.49.
The 90% confidence interval is (.
(Round to two decimal places as needed.)
The 95% confidence interval is
(Round to two decimal places as needed.)
Which interval is wider? Choose the correct answer below.
The 95% confidence interval
The 90% confidence interval
Interpret the results.
A. You can be 90% confident that the population mean price of the stock is outside the bounds of the 90% confidence interval, and 95% confident for the 95% interval.
B. You can be certain that the closing price of the stock was within the 90% confidence interval for approximately 38 of the 42 days, and was within the 95% confidence interval for approximately 40 of the 42 days.
C. You can be certain that the population mean price of the stock is either between the lower bounds of the 90% and 95% confidence intervals or the upper bounds of the 90% and 95% confidence intervals.
D. You can be 90% confident that the population mean price of the stock is between the bounds of the 90% confidence interval, and 95% confident for the 95% interval.
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