Question

An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 416 420 422 422 425 427 430 435 437 439 445 446 449 451 456 463 465 (a) Construct a boxplot of the data. 420 430 440 450 420 430 440 450 460 420 430 440 450 460 420 430 440 450 460 Comment on any interesting features. (Select all that apply.) The data appears to be centered near 438. There is one outlier. There is little or no skew. The data is strongly skewed. The data appears to be centered near 428. There are no outliers. (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 450 is a plausible value? Yes No

Answer 1

youvi you Dato: al Plot D Is is correct. H - The Data appears to be centered near - There is little No skew - There are No outliers b) Yes. c) 95% 0 c.lt (X- tn-l, I X + tn-lie . s) 2 V =) ( 438112 - (2-1199) (15:34) Viz =) ( 43 8:12 7 => (480:23 , 446101 * Yes * No