Suppose a computer company claims that its laptop batteries average more than 3.5 hours of use per charge. A sample of 45 batteries last an average of 3.72 hours. Assume the population standard deviation is 0.7 hours. (i) Test the company's claim at a=0.10 significance level by comparing the calculated z-score to the critical z-score. (ii) Test the company's claim at a=0.01 significance level by comparing the calculated z-score to the critical z-score. (iii) Verify your answer to problem (i) by comparing the sample mean to the critical sample mean Xe at an a=0.10 level of significance.
Suppose a computer company claims that its laptop batteries average more than 3.5 hours of use per charge. A sample of 45 batteries last an average of 3.72 hours. Assume the population standard deviation is 0.7 hours. (i) Test the company's claim at a=0.10 significance level by comparing the calculated z-score to the critical z-score. (ii) Test the company's claim at a=0.01 significance level by comparing the calculated z-score to the critical z-score. (iii) Verify your answer to problem (i) by comparing the sample mean to the critical sample mean Xe at an a=0.10 level of significance.
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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