Compute the mean, standard deviation, standard error, and 95% CI for the mean verbal IQ for children
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Compute the mean, standard deviation, standard error, and 95% CI for the mean verbal IQ for children with specific values of the variable lead_grp. Provide a box plot comparing the distribution of verbal IQ for subjects with lead_grp = 1, 2, and 3. Summarize your findings concisely?
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