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Use the following table to answer questions 4 to 9. 4,331 women were studied by researchers at Mayo Clinic with the results shown in the table below. (Source: Michael Weitzman, Steven Gortmaker, Deborah Klein Walker, and Arthur Sobol, Maternal Smoking and Childhood Asthma, Pediatrics, Vol. 85, No. 4, April 1990) Mothers Smoked Didnt Row Total Education Smoke 393 560 Some College 121 640 1,033 Below high school High School 1,370 635 550 1,930 756 598 College Degree 48 Col Total 1,122 3,209 4,331 4. What is the probability that a mother in the study smoked during pregnancy? 5. What is the probability that a mother smoked during pregnancy if her education level is below high school? 6. What is the probability that a mother smoked during pregnancy and had a college degree?
7. What is the probability that a mother smoked during pregnancy or that she graduated from college? 8. If a mother attended college, what is the probability that she did not smoke during her pregnancy? 9. Is smoking during pregnancy independent of education?
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