1. Quote of the Day
Mathematical rigor is like clothing; in its style it ought to suit the occasion, and it diminishes comfort and restrains freedom of movement if it is either too loose or too tight. -G. F. Simmons

2. Use Measures of Central Tendency and Dispersion
Section 13.6

3. Objectives:
Compare measures of central tendency and dispersion

4. Key Vocabulary:
Measure of dispersion
Range
Mean absolute deviation

5. Central Tendency

6. Example 1:
The heights (in feet) of 8 waterfalls in the state of Washington are listed below. What measure of central tendency best represents the data? 1000, 1000, 1181, 1191, 1200, 1268, 1328, 2584

7. #1: Complete.
In Example 1, suppose you eliminate the greatest data value, Which measure of central tendency best represents the remaining data? Explain.

8. Measures of Dispersion
A measure of dispersion describes the dispersion, or spread, of data

9. Measures of Dispersion

10. Example 2:
The top 10 finishing times (in seconds) for runner in two men’s races are given. The times in a 100 meter dash are in set A, and the times in a 200 meter dash are in set B. Compare the spread of the data for the two sets using (a) the range and (b) the mean absolute deviation. A: 10.62, 10.94, 10.98, 11.05, 11.13, 1115, 11.28, 11.29, B: 21.37, 21.40, 22.23, 22.23, 22.34, 22.34, 22.36, 22.60, 22.66, 22.73

11. Partner Work
Page 877 #3, 5, 10, 13, 15

12. Homework Assignment
Page 877 #4, 6, 8,
12, 14, 16, 20, 22