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. Suppose that your agency has been evaluating an intervention using a posttest-only control group design. There were 155 people in the treatment group and

. Suppose that your agency has been evaluating an intervention using a posttest-only control group design. There were 155 people in the treatment group and 140 in the control group. The outcome variable is dichotomous. What statistical test would be most appropriate for testing the null hypothesis of no intervention effect?

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