Some researchers in Minnesota were interested in evaluating the relationship between the

drinking water levels of pesticides used in the farming community and birth defects.In 1995, they conducted a comparison between Minnesota birth defect data and Illinois birth defect data but they "forgot" to consider the differences in the drinking water sources between the two states.You, as an astute epidemiologist, come along to assist them in making the comparison of birth defect rates that adjusts (standardizes) for differences in drinking water.The data that were made available to you are below:

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