13. In order to see whether people are keeping their automobile tires inflated to the correct level (35 pounds per square inch, psi) a tire company manager selects a sample of 36 tires and checks the pressure. The mean of the sample is 33.5 psi, and the standard deviation is 3. Are the tires properly inflated? Use a = 0.10. Find the 90% confidence interval of the mean. Do the results agree? Explain.
13. In order to see whether people are keeping their automobile tires inflated to the correct level (35 pounds per square inch, psi) a tire company manager selects a sample of 36 tires and checks the pressure. The mean of the sample is 33.5 psi, and the standard deviation is 3. Are the tires properly inflated? Use a = 0.10. Find the 90% confidence interval of the mean. Do the results agree? Explain.
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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