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Based on 20 samples, the average resistance is 25 ohms and the sample standard deviation is...

Based on 20 samples, the average resistance is 25 ohms and the sample standard deviation is 0.5 ohm. Determine the 90% confidence interval of the standard deviation of the batch.

PLEASE SOLVE FOR THE STANDARD DEVIATION, NOT THE MEAN VALUE. I REPEAT< SOLVE FOR THE STANDARD DEVIATION FOR THE CONFIDENCE INTERVAL

Math   Advanced-Math   
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Answer #1

We have find the 90% confidence interval of the standard deviation of the sample using Chi-square distribution.

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