An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 415 420 422 422 425 429 430 434 436 438 446 446 450 453 459 463 464 (a) construct a boxplot of the data. comment on any interesting features. (select all that apply.) the data appears to be centered near 438. the data is strongly skewed. there is one outlier. the data appears to be centered near 428. there are no outliers. there is little or no skew. (b) is it plausible that the given sample observations were selected from a normal distribution? yes 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 438 is a plausible value for true average degree of polymerization? yes no does the interval suggest that 452 is a plausible value? yes no