Question: Use the normal-theory method to test for significant differences in contraceptive-use patterns between the two groups? Gynecology In a 1985 study of the relationship between

Use the normal-theory method to test for significant differences in contraceptive-use patterns between the two groups?

Gynecology

In a 1985 study of the relationship between contraceptive use and infertility, 89 of 283 infertile women, compared with 640 of 3833 control (fertile) women, had used an intrauterine device (IUD) at some time in their lives [43].

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