An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 418 421 422 422 425 429 430 435 436 438 445 447 450 453 457 461 465 (a) Construct a boxplot of the data. O 420 430 440 450 460 420 430 440 450 O 420 430 440 450 460 O 420 430 440 450 460 Comment on any interesting features. (Select all that apply.) There is one outlier. O The data appears to be centered near 438. O There is little or no skew. O The data appears to be centered near 428. O The data is strongly skewed. O There are no outliers. (b) Is it plausible that the given sample observations were selected from a normal distribution? O Yes O 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 443 is a plausible value for true average degree of polymerization? O Yes O NO Does the interval suggest that 453 is a plausible value? O Yes O NO