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C. Find the 99% confidence interval for u. d. What conclusions can you make, based on each estimate?

C. Find the 99% confidence interval for u. d. What conclusions can you make, based on each estimate?

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 ONLY C AND D.
4. A sample of 100 Grade 9 students' ages have been obtained to estimate the mean age of all Grade 9 students. X= 16 years and the population variance is 16. a. What is the point estimate for u? - The point estimate of population mean is sample mean = 16 b. Find the 95% confidence interval for u. The critical value for ? = 0.05 and for two tailed test. Zc = 1.96 90% C.I = ( x ± Zc x ?/vn) = ( 16 ± 1.96*4v100) = ( 15.216, 16.784 ) C. Find the 99% confidence interval for µ. d. What conclusions can you make, based on each estimate?
Transcribed Image Text:4. A sample of 100 Grade 9 students' ages have been obtained to estimate the mean age of all Grade 9 students. X= 16 years and the population variance is 16. a. What is the point estimate for u? - The point estimate of population mean is sample mean = 16 b. Find the 95% confidence interval for u. The critical value for ? = 0.05 and for two tailed test. Zc = 1.96 90% C.I = ( x ± Zc x ?/vn) = ( 16 ± 1.96*4v100) = ( 15.216, 16.784 ) C. Find the 99% confidence interval for µ. d. What conclusions can you make, based on each estimate?
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