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The average student loan debt for college graduates is $25,600

Math

The average student loan debt for college graduates is $25,600. Suppose that that distribution is normal and that the standard deviation is $14,050. Let X = the student loan debt of a randomly selected college graduate. Round all probabilities to 4 decimal places and all dollar answers to the nearest dollar.

a.  What is the distribution of X? X ~ N(_____,_______)

b   Find the probability that the college graduate has between $16,300 and $31,400 in student loan debt. 

c.  The middle 30% of college graduates' loan debt lies between what two numbers?
     Low: $___
     High: $___

Please show it to me how you use the T1 84 calculator for this.

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