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Representing Two Categorical Variables

AP Statistics· difficulty 1/5

The two-way table shows pet ownership by grade.

Pet ownership by grade Grade Pet No Pet Total 9 40 20 60 10 30 30 60 Total 70 50 120

What is the marginal proportion of students who own a pet?

  • A

    40/60

  • B

    40/120

  • C

    70/120

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  • D

    70/60

Explanation

The marginal proportion uses the row/column total over the grand total: 70 owners out of 120 students.

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