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According to the Agency for Healthcare Research and Quality, the average length of a hospital stay...

According to the Agency for Healthcare Research and Quality, the average length of a hospital stay is 4.5 days. Hospitals can reap many benefits by decreasing the length of patient stays in the hospital. A random sample of 7,200 stays in an Idaho hospital had an average stay of 4.2 days with a standard deviation of 8.3 days. Determine whether there is evidence that the Idaho hospital has an average stay that is lower than the national average. In the box below, write your hypothesis.

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