Recent studies, as summarized, for example, in E. Mortensen et al. (2002). The association between duration of
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Recent studies, as summarized, for example, in E. Mortensen et al. (2002). The association between duration of breastfeeding and adult intelligence. Journal of the American Medical Association, 287, 2365–2371, suggest that breastfeeding of infants may increase their subsequent cognitive (IQ) development. Both experiments and observational studies are cited.
(a) What determines whether some of these studies are experiments?
(b) Name at least two potential confounding variables controlled by breastfeeding experiments.
Related Book For
Practicing Statistics Guided Investigations for the Second Course
ISBN: 978-0321586018
1st edition
Authors: Shonda Kuiper, Jeff Sklar
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