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High school graduates: The National Center for Educational Statistics reported that 82% of freshmen entering public high school in the U.S. in 2009 graduated

High school graduates: The National Center for Educational Statistics reported that 82% of freshmen entering public high school in the U.S. in 2009 graduated with their class in 2013. A random sample of 135 freshman is chosen. a. Find the mean up. b. Find the standard deviation p.

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