An article contained the following observations on degree ofpolymerization for paper specimens for which viscosity timesconcentration fell in a certain middle range:
| 415 | 421 | 422 | 422 | 425 | 427 | 430 | 435 | 436 |
| 439 | 446 | 446 | 448 | 453 | 457 | 462 | 464 |
(a) Construct a boxplot of the data.
Comment on any interesting features. (Select all that apply.)
The data appears to be centered near 428.There are nooutliers.The data appears to be centered near 438.There is oneoutlier.There is little or no skew.The data is strongly skewed.
(b) Is it plausible that the given sample observations wereselected from a normal distribution?
YesNoĂ‚Â Ă‚Â Ă‚Â Ă‚Â
(c) Calculate a two-sided 95% confidence interval for true averagedegree of polymerization. (Round your answers to two decimalplaces.)
Ă‚Â Ă‚Â ,
Does the interval suggest that 443 is a plausible value for trueaverage degree of polymerization?
YesNoĂ‚Â Ă‚Â Ă‚Â Ă‚Â
Does the interval suggest that 450 is a plausible value?
YesNoĂ‚Â Ă‚Â Ă‚Â Ă‚Â
