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Biology, 18.08.2020 20:01 deemy0292

1.15 A study of a very large number of pregnant women in Arkansas reports that the women gained, on average, 14
pounds during their pregnancy and that 18% of the
women smoked. 20 Which of the following is not a variable
in this study?
(a) Pregnancy status
(b) Smoking status
(c) Weight gain

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