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The Associated Press (San Luis Obispo Tele- gram-Tribune, August 23, 1995) reported on the results of mass screening of schoolchildren for tuberculosis (TB). For Santa Clara County, California, the propor- tion of all tested kindergartners who were found to have TB was .0006. The corresponding proportion for recent immigrants (thought to be a high-risk group) was .0075. Suppose that a Santa Clara County kindergartner is selected at random. Are the events selected student is a recent immigrant and selected student has TB independent or dependent events? Justify your answer using the given information.

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Statistics and Probability, Statistics

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