Question

In: Statistics and Probability

An article contained the following observations on degree of polymerization for paper specimens for which viscosity...

An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range:

415 421 422 422 425 427 430 435 436
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 no outliers.The data appears to be centered near 438.There is one outlier.There is little or no skew.The data is strongly skewed.


(b) Is it plausible that the given sample observations were selected from a normal distribution?

YesNo    


(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 443 is a plausible value for true average degree of polymerization?

YesNo    


Does the interval suggest that 450 is a plausible value?

YesNo    

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