1. 2.3 Measures of Central Tendency

2. I. Mean, Median, and Mode O Measure of Central Tendency: a value that represents a typical, or central, entry of a data set O Mean: sum of the entries # of entries Population:Sample: O Pg 60 TIY #1

3. O Median: the value that lies in the middle when the data is ordered O Pg 61 TIY#2 & 3

4. O Mode: data entry that occurs with the most frequency (no mode, bimodal, multimodal) O Pg 62 TIY #4 & 5

5. O Outlier: data entry far removed from the others O If data has an outlier use the median not the mean as the best measure of central tendency O Pg 63 TIY#6

6. II. Weighted Mean & the Mean of Grouped Data

7. Page 64 TIY #7

9. Page 65 TIY #8

10. Homework O PAGES 68 – 73 O #16, 22, 30, 32, 40, 42, 44, 46