An investigation of the relative merits of two kinds to fiashlight batteries showed that a random sample of 100 batteries of brand X lasted on the average 36.5 hours with a standard deviation of 1.8 hours, while a random sample of 80 batteries of brand Y, lasted on the average 36.8 hours with a standard deviation of 1.5 hours. Use a level of significance of 0.05 to test whether the observed difference between the average life times is significant.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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An investigation of the relative merits of two kinds to fiashlight batteries
showed that a random sample of 100 batteries of brand X lasted on the average 36.5 hours
with a standard deviation of 1.8 hours, while a random sample of 80 batteries of brand Y,
lasted on the average 36.8 hours with a standard deviation of 1.5 hours. Use a level of
significance of 0.05 to test whether the observed difference between the average life times
is significant.
Transcribed Image Text:An investigation of the relative merits of two kinds to fiashlight batteries showed that a random sample of 100 batteries of brand X lasted on the average 36.5 hours with a standard deviation of 1.8 hours, while a random sample of 80 batteries of brand Y, lasted on the average 36.8 hours with a standard deviation of 1.5 hours. Use a level of significance of 0.05 to test whether the observed difference between the average life times is significant.
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