According to the Project on Student Debt the average student
According to the Project on Student Debt, the average student loan for college graduates of the class of 2010 was $25,000 (USA TODAY, April 24, 2012). Suppose that the student loans for all college graduates of the class of 2010 have a mean of $25,000 and a standard deviation of $6280. Let  be the average student loan of a random sample of 400 college graduates from the class of 2010. Find the mean and standard deviation of the sampling distribution of 
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