Refer to Table 3.7, which classifies police officers by rank, race, and promotion decisions made in 1988.

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Refer to Table 3.7, which classifies police officers by rank, race, and promotion decisions made in 1988.

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a. Conduct an exact test of conditional independence of promotion and race, given rank. Interpret, and compare results to the large-sample test.

b. Conduct an exact test of whether the odds ratio is identical for the four ranks. Interpret, and compare results to the large-sample test.

c. Construct and interpret a confidence interval for an assumed common odds ratio.

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