Representing Two Categorical Variables

AP Statistics· difficulty 2/5

The table shows outcomes by treatment group.

Treatment vs outcome Group Cured Not Total Drug 90 30 120 Placebo 40 40 80 Total 130 70 200

What proportion of the Drug group was cured?

  • A

    120/200 = 0.60

  • B

    90/120 = 0.75

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  • C

    90/130 = 0.69

  • D

    90/200 = 0.45

Explanation

Conditional on Drug: 90 of the 120 Drug subjects were cured, giving 0.75.

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