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A simple random sample of size n= 40 is drawn from a population. The sample mean is found to be x = 121.6 and the sample standard deviation is found to be s = 12.8. Construct a 99% confidence interval for the population mean. The lower bound is. (Round to two decimal places as needed.)

A simple random sample of size n= 40 is drawn from a population. The sample mean is found to be x = 121.6 and the sample standard deviation is found to be s = 12.8. Construct a 99% confidence interval for the population mean. The lower bound is. (Round to two decimal places as needed.)

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
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A simple random sample of size \( n = 40 \) is drawn from a population. The sample mean is found to be \( \bar{x} = 121.6 \) and the sample standard deviation is found to be \( s = 12.8 \). Construct a 99% confidence interval for the population mean. The lower bound is \(\underline{\phantom{000}}\). (Round to two decimal places as needed.)
Transcribed Image Text:A simple random sample of size \( n = 40 \) is drawn from a population. The sample mean is found to be \( \bar{x} = 121.6 \) and the sample standard deviation is found to be \( s = 12.8 \). Construct a 99% confidence interval for the population mean. The lower bound is \(\underline{\phantom{000}}\). (Round to two decimal places as needed.)
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