Question

The amount of aluminum contamination (in parts per million) in plastic was determined for a sample of 26 plastic specimens, resulting in the following data (“The Log Normal Distribution for Modeling Quality Data When the Mean Is Near Zero,” Journal of Quality Technology [1990]: 105– 110):
Construct a boxplot that shows outliers, and comment on the interesting features of this plot.


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  • CreatedSeptember 19, 2015
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