Prob-5 In a certain design, it is important that standard deviation of the current be less than 21 mA. In a test of n=15 parts, the sample standard deviation is found to be 18 mA. Can we be 95% confident that the standard deviation will not exceed 21 mA? Solution: v=n-1 (n-1)S² Xap so²s (n-1)5² Xul-a/2 X₁pt2 X₁1-0²2

MATLAB: An Introduction with Applications
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Prob-5
In a certain design, it is important that standard deviation of the current be less than 21 mA. In a test of n=15 parts, the sample standard deviation is found to be 18
mA. Can we be 95% confident that the standard deviation will not exceed 21 mA? Solution:
v=n-1
(n-1)5²
Xap2
so's
(n-1)5²
Xal-a/2
Xap2
Xal-on
Transcribed Image Text:Prob-5 In a certain design, it is important that standard deviation of the current be less than 21 mA. In a test of n=15 parts, the sample standard deviation is found to be 18 mA. Can we be 95% confident that the standard deviation will not exceed 21 mA? Solution: v=n-1 (n-1)5² Xap2 so's (n-1)5² Xal-a/2 Xap2 Xal-on
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