2.3 Measures of Central Tendency. I. Mean, Median, and Mode O Measure of Central Tendency: a value that represents a typical, or central, entry of a data.

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2.3 Measures of Central Tendency

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

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

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

II. Weighted Mean & the Mean of Grouped Data

Page 64 TIY #7

Page 65 TIY #8

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