In a certain design, it is important that standard deviation of the current be less than 21 mA. In a test of n-18 parts, the sample standard deviation is found to be 18 mA Can we be 90% confident that the standard deviation will not exceed 21 mA?

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05-12-2022
Engineering

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In a certain design, it is important that standard deviation of the current be less than 21 mA. In a test of n-18 parts, the sample standard deviation is found to be 18 mA Can we be 90% confident that the standard deviation will not exceed 21 mA?

Sagot :

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