The article Measuring and Understanding the Aging of Kraft
Chapter 7, Problem 7.33(choose chapter or problem)
The article Measuring and Understanding the Aging of Kraft Insulating Paper in Power Transformers (IEEE Electrical Insul. Mag., 1996: 2834) contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 418 421 421 422 425 427 431 434 437 439 446 447 448 453 454 463 465 a. Construct a boxplot of the data and comment on any interesting features. b. Is it plausible that the given sample observations were selected from a normal distribution? c. Calculate a two-sided 95% confidence interval for true average degree of polymerization (as did the authors of the article). Does the interval suggest that 440 is a plausible value for true average degree of polymerization? What about 450?
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