Combine the data from Exercises 6.5 and 6.6 into a two-way contingency table and run the appropriate test. How does the question that the two-way classification addresses differ from the questions...

Combine the data from Exercises 6.5 and 6.6 into a two-way contingency table and run the appropriate test. How does the question that the two-way classification addresses differ from the questions addressed by Exercises 6.5 and 6.6?

We know that smoking has all sorts of ill effects on people; among other things, there is evidence that it affects fertility. Weinberg and Gladen (1986) examined the effects of smoking and the ease with which women become pregnant. They took 586 who had planned pregnancies, and asked them how many menstrual cycles it had taken for them to become pregnant after discontinuing contraception. They also sorted the women into whether they were smokers or non-smokers. The data follow.

Does smoking affect the ease with which women become pregnant? (I do not recommend smoking as a birth control device, regardless of your answer.)