1. 11.7 Standard Deviation SWBAT: -Find the standard deviation and variance of a set of values. -Apply standard deviation and variance.

2. Vocabulary

4. EX 1 – What are the mean, variance, and standard deviation of these values? 6.9 8.7 7.6 4.8 9.0

5. EX 1 Continued

6. EX 2 – What are the mean, variance, and standard deviation of these values? 52 63 65 77 82

7. EX 3 – The table displays the number of U.S. hurricane strikes by decade from the years 1851 to 2000. What are the mean and standard deviation for this data set?

8. Using Standard Deviation to Describe Data

9. COMMERCIAL BREAK!!

10. The Normal Bell Curve

11. What does this really mean?

13. EX 4 - Use the U.S. hurricane-strike data from problem 3. Within how many standard deviations from the mean do all of the values fall? All of the values fall within two standard deviations of the mean.