A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 40 batteries showed a sample mean life of 90.5 hours. assume that the population standard deviation is known to be 9 hours. Test at a 5% level of significance to see if there is evidence that the mean life of "D" batteries has increased. What is your Conclusion?
A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 40 batteries showed a sample mean life of 90.5 hours. assume that the population standard deviation is known to be 9 hours. Test at a 5% level of significance to see if there is evidence that the mean life of "D" batteries has increased. What is your Conclusion?
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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A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 40 batteries showed a sample
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