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The variance in drug weights is critical in the pharmaceutical industry. For a specific drug, with...

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Basic Math

The variance in drug weights is critical in the pharmaceuticalindustry. For a specific drug, with weights measured in grams, asample of 20 units provided a sample variance of s^2 = 0.49.

a)  construct a 90% confidence interval estimate forthe population variance

b) construct a 90% confidence interval estimate of thepopulation standard deviation

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