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Answer the following. 1. Find tæ/2 for a 99% confidence interval of a sample with size 20. 2. Find ta/2 for a 95% confidence interval of a sample with size 10. 3. Find the 99% confidence interval for a sample with n=17, X-7.6, and s=2.3.

Answer the following. 1. Find tæ/2 for a 99% confidence interval of a sample with size 20. 2. Find ta/2 for a 95% confidence interval of a sample with size 10. 3. Find the 99% confidence interval for a sample with n=17, X-7.6, and s=2.3.

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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Answer the following. 1. Find tæ/2 for a 99% confidence interval of a sample with size 20. 2. Find tæ/2 for a 95% confidence interval of a sample with size 10. 3. Find the 99% confidence interval for a sample with n=17, X=7.6, and s=2.3. 4. A sample composed of 20 male senior high school students were taken randomly from a normally distributed population. Their heights were taken, and it was found out that the mean is 65 inches with a standard deviation of 2.15 inches. With 99% confidence, find an interval estimate for the population mean. 5. A certain sample whose size is 10 is known to have a mean of 73.25 with a standard deviation of 2.5. Find tx/2 for a 95% confidence interval.
Transcribed Image Text:Answer the following. 1. Find tæ/2 for a 99% confidence interval of a sample with size 20. 2. Find tæ/2 for a 95% confidence interval of a sample with size 10. 3. Find the 99% confidence interval for a sample with n=17, X=7.6, and s=2.3. 4. A sample composed of 20 male senior high school students were taken randomly from a normally distributed population. Their heights were taken, and it was found out that the mean is 65 inches with a standard deviation of 2.15 inches. With 99% confidence, find an interval estimate for the population mean. 5. A certain sample whose size is 10 is known to have a mean of 73.25 with a standard deviation of 2.5. Find tx/2 for a 95% confidence interval.
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