An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 415 421 422 422 425 427 431 435 436 439 446 447 450 451 456 462 465 (c) Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places.) 438.24 X 438.24 x )

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