Suppose you are studying college graduates in the US. You know that the population mean student loan debt is $34,500 and the population standard deviation is $22,800.

You can compute the area under the normal curve here: http://www.stat.berkeley.edu/~stark/SticiGui/Text/clt.htm#normal_curve

What is the probability of selecting a college graduate at random:

- With a debt greater than $50,000?
- With a debt less than $10,000?
- With a debt greater than $30,000 but less than $40,000?
- With a debt greater than $15,000 but less than $25,000?
- With a debt greater than $55,000 but less than $75,000?

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## Comments

## Joyce, Travis, Gregory

> 10000-34500

[1] -24500

> -24500/22800

[1] -1.074561

Z=-1.07

## NEGLA AND JAKE AND ME ANNA WILLIAMS THE GENIUS

z= (55,000-34,500)/22,800

z=.899

z= (75,000-34,500)/22,800

z=1.776

## ELISA N, ALESSIA, SAMIR, LIZ B.

Pop. mean = 34,500

Pop. sd = 22,800

50000-34500/22800

z= 0.6798

24.83%

## Marta C. Brenda R.

3. z=.197

z=.241

Percentage: 17.33%

## Kentonb, Ahmed Diallo

standard deviation is $22,800.

Mean:$15,000 but less than $25,000

Z1=-0.85

Z2=-0.41