Question

Simple regression was employed to establish the effects of childhood exposure to lead. The effective sample size was about 122 subjects. The independent variable was the level of dentin lead (parts per million). Below are regressions using various dependent variables.
(a) Calculate the t statistic for each slope.
(b) From the p-values, which slopes differ from zero at α = .01?
(c) Do you feel that cause and effect can be assumed? Do a web search for information about effects of childhood lead exposure.


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  • CreatedAugust 19, 2015
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