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
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Answer 1 2 3
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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