1. ... dollars) for 45 taxpayers with incomes between $100,000 and $200,000. One plot shows the actual (income, tax) pairs; the other two scramble the pairs.

    1. Does the IRS need total income to be associated with the taxes paid if such data are to help it identify tax cheats?2

    2. Are the taxes paid associated with the total income?3

    Three scatterplots

Describing Association in a Scatterplot

Once you decide that a scatterplot shows association, then you need to describe the association. ...

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