Ann is studying the effect of having children on the divorce rate. She selects a

Question

Ann is studying the effect of having children on the divorce rate. She selects a SRS of 200 couples who had children and checks how many of these couples are divorced within 5 years. What type of hypothesis test should she run?

A. a 1-sample test of means to see if the average divorce rate is different from the national average

B. a 2-sample test of means to see if the average divorce rate is different for childless couples

C. a paired t-test comparing husbands and wives

D. a 1-sample test of proportions comparing her proportions of divorces with the national percent after five years of marriage

E. a 2-sample test of proportions comparing the proportions of divorced couples with the proportion of those still married

F. None of the above

Explanation / Answer

A. a 1-sample test of means to see if the average divorce rate is different from the national average

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