Chapter 4
Measures of Central Tendency

I. Arithmetic Mean. . . .

A. Raw Data...Worked Problem

B.  Visual Summary:  Computing the mean from raw scores

C. Grouped Frequency Distribution

          D.  Visual Summary:  Computing the mean from a grouped frequency distribution

II. Median...The middle score

A. Raw Data...Worked Problem

1. Odd number of scores...

2. Even number of scores...Average of the:

B. Grouped Frequency Distribution

C.  Visual Summary:  Finding the median in a grouped frequency distribution

III. Mode...The most frequent score

A. Raw Data...Worked Problem

B. Frequency Distribution

Copyright © 2004 by Mark W. Vernoy