# Question: Applet Exercise demonstrates that probability is equal to area under

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

b. P(a student sleeps between 2 and 4 hours)

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

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

b. P(a student sleeps between 2 and 4 hours)

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

## Answer to relevant Questions

Skillbuilder Applet Exercise demonstrates the effects that the mean and standard deviation have on a normal curve. a. Leaving the standard deviation at 1, increase the mean to 3. What happens to the curve? b. Reset the mean ...Based on a survey conducted by Greenfield Online, 25 to 34-year-olds spend the most each week on fast food. The average weekly amount of $44 was reported in a May 2009 USA Today Snapshot. Assuming that weekly fast food ...According to ACT, results from the 2008 ACT test-ing found that students had a mean reading score of 21.4 with a standard deviation of 6.0. Assuming that the scores are normally distributed, a. find the probability that a ...“On-hold” times for callers to a local cable television company are known to be normally distributed with a standard deviation of 1.3 minutes. Find the average caller “on-hold” time if the company maintains that no ...Using the z(a) notation (identify the value of a used within the parentheses), name each of the standard normal variable z’s shown in the following diagrams.Post your question