1. Summarize and Compare Responses  Mean (Average)  Median  Standard Deviation  Mean (Average)  Median  Standard Deviation

2. 16, 23, 25, 17, 26, 24, 11, 24, 19, 21, 15, 13, 21, 21, 20, 20, 21, 28, 18, 17, 17, 22, 20, 10, 22, 23, 16, 22, 20, 21, 21, 21, 31, 17, 21, 16, 16, 20, 18, 22, 18, 22, 22, 16, 21, 17, 25, 20, 21, 26 Hypothetical: David Archuleta releases a CD  50 CD buyers, chosen at random.  Asked their age.  50 CD buyers, chosen at random.  Asked their age.

3. 16, 23, 25, 17, 26, 24, 11, 24, 19, 21, 15, 13, 21, 21, 20, 20, 21, 28, 18, 17, 17, 22, 20, 10, 22, 23, 16, 22, 20, 21, 21, 21, 31, 17, 21, 16, 16, 20, 18, 22, 18, 22, 22, 16, 21, 17, 25, 20, 21, 26 Hypothetical: David Archuleta releases a CD  50 CD buyers, chosen at random.  Asked their age.  50 CD buyers, chosen at random.  Asked their age. Mean = 20.1 years Median = 21.0 years Standard Deviation = 4.1 years

4. Frequency Table

5. Frequency Histogram

6. 50 responses

7. 1000 responses

8. 2000 responses

9. 3000 responses

10. 4000 responses

11. 5000 responses

12. 6000 responses

13. Bell Shaped Pattern

14. Gaussian (Normal) Distribution

15. Peaked & Symmetric

16. 2 Inflection Points

17. “Spread” in Responses Standard Deviation

18. 68.3% of Total Area

19. CD Sales in Missouri

20. Different Mean & Std. Dev.

21. Still 68.3% of Total Area

22. Skewed Distribution

24. Utah Sales Missouri Sales