Skillbuilder Applet Exercise demonstrates that probability is equal to the 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 the following:

a. P(a student sleeps between 5 and 9 hours)

b. P(a student sleeps less than 4 hours)

c. P(a student sleeps between 8 and 11 hours)

densty 02 01 123456789 10 11 12 13 Hours of sleep and Area between Compute 0.7606