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The variance in drug weights is critical in the pharmaceutical industry. For a specic drug, with weights measured in grams, a sample of 18 units

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The variance in drug weights is critical in the pharmaceutical industry. For a specic drug, with weights measured in grams, a sample of 18 units provided a sample variance of s2 = .36. a. Construct a 90% condence interval estimate of the population variance for the weight of this drug. b. Construct a 90% condence interval estimate of the population standard deviation

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