Suppose we randomly sample 50 diabetics from among Irvine residents for a research study, and then for each diabetic we sample one non-diabetic Irvine resident with the same sex, age (within 5 years), and race. Among these participants there are 21 pairs for which the diabetic reports low SES and the non-diabetic reports high SES, 9 pairs for which both report low SES, 2 pairs for which both report high SES, and 18 pairs for which the diabetic reports high SES and the non-diabetic reports low SES. Test the null hypothesis that there is no association between SES and diabetes in Irvine.

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Suppose we randomly sample 50 diabetics from among Irvine residents for a research study, and then for each diabetic we sample one non-diabetic Irvine resident with the same sex, age (within 5 years), and race. Among these participants there are 21 pairs for which the diabetic reports low SES and the non-diabetic reports high SES, 9 pairs for which both report low SES, 2 pairs for which both report high SES, and 18 pairs for which the diabetic reports high SES and the non-diabetic reports low SES. Test the null hypothesis that there is no association between SES and diabetes in Irvine.

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