(Answered) The pheno data set contains phenotype information for 2457

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The pheno data set contains phenotype information for 2457 subjects from the Finland-United States Investigation of NIDDM Genetics (FUSION) study of type 2 diabetes [SMS+04]. Among the physical measurements recorded is the weight (in kg) of the subjects.

a) Make a normal-quantile plot of the weights of all subjects in this data set. Do the weights appear to be normally distributed?

b) Now make conditional normal-quantile plots, conditioned on sex. Do the weights of the men and women in this study appear to be approximately normally distributed? If not, how do the distributions differ from a normal distribution?

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