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To perform diagnostics on the consistency of a laboratory scale, multiple measurements are taken ...

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To perform diagnostics on the consistency of a laboratory scale, multiple measurements are taken ...

To perform diagnostics on the consistency of a laboratory scale, multiple measurements are taken using a reference weight over the course of several days. The variance observed over 20 repeated measures is 248. A 99% confidence interval for the measurement variance is (122.129, 688.486). Would it be reasonable to believe that the population variance is 670?

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No, because this value is too far above the sample variance of 248.

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Yes, because this value is within the 99% confidence interval.

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No, because a sample size of 20 is too small for estimation purposes.

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We cannot tell without more information.

Textbook

Introductory Statistics: A Problem-Solving Approach

Edition: 3^rd

Author: Kokoska

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