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  3. an article contained the following observations on

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

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Question

Statistics

An article contained the following observations on degree ofpolymerization for paper specimens for which viscosity timesconcentration fell in a certain middle range:

415421422422425427430435436
439446446448453457462464

(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?

YesNo    


(c) Calculate a two-sided 95% confidence interval for true averagedegree of polymerization. (Round your answers to two decimalplaces.)

  ,



Does the interval suggest that 443 is a plausible value for trueaverage degree of polymerization?

YesNo    


Does the interval suggest that 450 is a plausible value?

YesNo    

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