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Records from a particular hospital were examined to determine the average length of stay for patients being treated for lung cancer. Data from a sample

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Records from a particular hospital were examined to determine the average length of stay for patients being treated for lung cancer. Data from a sample of 100 records showed sample mean= 2.1 months and s = 2.6 months. (a). Test that p, the average length of stay for patients being treated for lung cancer is greater than 2 months. Use a=.05. (b). Find a 95% condence interval for ,u

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