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# Demonstrates that probability is equal to area under a curve. Given that college students sleep an average of 7 hours per night, with a standard deviation equal to 1.7 hours, use the scroll bar in the applet to find:a. $\quad P(\text { a student sleeps between } 5 \text { and } 9$ hours)b. $\quad P(\text { a student sleeps between } 2 \text { and } 4$ hours)c. $\quad P(\text { a student sleeps between } 8 \text { and } 11$ hours)

## a .7606; b .0372; c. .2689

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