Appendix B Data Sets. In Exercises 912, refer to the indicated data set in Appendix B and use the Wilcoxon ranksum test.. IQ and Lead Exposure Data Set 5 in Appendix B lists full IQ scores for a random sample of subjects with medium lead levels in their blood andanother random sample of subjects with high lead levels in their blood. Use a 0.05 significance level to test the claim that subjects with medium leadlevels have full IQ scores with a higher median than the median full IQ score for subjects with high lead levels. Does lead level appear to affect full IQscores?

Sampling and Experimental Design: Here are a few basic definitions that set the stage for some of the terminology you use in sampling: Population All the people or items of interest that you are looking to make an inference for Sample A small subset of the population to observe data on - The sample must be unbiased and representative of the population for...