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 |
426 |
426 |
431 |
434 |
437 |
| 439 |
445 |
446 |
449 |
453 |
458 |
461 |
464 |
Comment on any interesting features. (Select all that apply.)
There is little or no skew.
There are no outliers.The data is strongly skewed.
The data appears to be centered near 438.
The data appears to be centered near 428.
There is one outlier.
(c) Calculate a two-sided 95% confidence interval for true average degree of polymerization. (Round your answers to two decimal places.)