Outliers
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Data Set 1

Problem 3

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last modified on 1/20/07

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Problem 2

Open Data Set 1, using the link on the left, which is an Excel file containing the mass and the year of minting for 47 pennies.

Task 1. Plot this data in Excel and consider whether there are any possible outliers. Why did you select the results that you did and for what years are they? Propose several reasons for why the mass of an individual penny might be an outlier?

Task 2. Use this link to learn more about the history and production of the U. S. penny. Does this information allow you to reach a conclusion about any of the possible outliers? Does it explain all possible outliers? If not, is there any additional information that might help you evaluate any of the remaining possible outliers?

After completing these tasks, proceed to Problem 3.