A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is o = 15. (a) Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.) to (b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. (Round your answers to two decimal places.) to (c) What is the effect of a larger sample size on the interval estimate? O A larger sample size does not change the margin of error. O A larger sample size provides a smaller margin of error. A larger sample size provides a larger margin of error.
A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is o = 15. (a) Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.) to (b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. (Round your answers to two decimal places.) to (c) What is the effect of a larger sample size on the interval estimate? O A larger sample size does not change the margin of error. O A larger sample size provides a smaller margin of error. A larger sample size provides a larger margin of error.
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 simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is o = 15.
(a) Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.)
to
(b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. (Round your answers to two
decimal places.)
to
(c) What is the effect of a larger sample size on the interval estimate?
A larger sample size does not change the margin of error.
A larger sample size provides a smaller margin of error.
A larger sample size provides a larger margin of error.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffa1f2822-8ee5-4468-b761-4648e25887d9%2F00a19f51-b247-4dda-ba6e-26e27c06ce7f%2Fx6iryi3_processed.png&w=3840&q=75)
Transcribed Image Text:A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is o = 15.
(a) Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.)
to
(b) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. (Round your answers to two
decimal places.)
to
(c) What is the effect of a larger sample size on the interval estimate?
A larger sample size does not change the margin of error.
A larger sample size provides a smaller margin of error.
A larger sample size provides a larger margin of error.
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