Testing Effects of Zinc A study of zinc-deficient mothers was conducted to determine effects of zinc supplementation
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Testing Effects of Zinc A study of zinc-deficient mothers was conducted to determine effects of zinc supplementation during pregnancy. Sample data are listed in the margin (based on data from “The Effect of Zinc Supplementation on Pregnancy Outcome,” by Goldenberg et al., Journal of the American Medical Association, Vol. 274, No. 6). The weights were measured in grams. Using a 0.05 significance level, is there sufficient evidence to support the claim that the variation of birth weights for the placebo population is greater than the variation for the population treated with zinc supplements?
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