rticle contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a ain middle range: 417 420 422 423 426 429 431 435 437 438 445 446 448 451 456 461 465 (a) Construct a boxplot of the data. 420 420 430 430 440 440 450 460 450 The data appears to be centered near 438. There are no outliers. There is one outlier. The data appears to be centered near 428. 420 Comment on any interesting features. (Select all that apply.) The data is strongly skewed. There is little or no skew. 420 430 Does the interval suggest that 453 is a plausible value? O Yes O No 430 440 440 450 450 460 460 (b) Is it plausible that the given sample observations were selected from a normal distribution? o Yes Ο No (c) Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places.) Does the interval suggest that 444 is a plausible value for true average degree of polymerization? o Yes O No

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