Is a statistical measure to determine a single score that defines the center of a distribution.
Goal: to find a score that is best representative of a entire group
Population Mean
Greek letter "mu"
Mean for sample
Is identified by M or X (read x-bar)
Mean
For a distribution is the sum of the scores divided by the number of scores
Weighted Mean
Combining two sets of scores
Median
If the scores in a distribution are listed in order from smallest to largest, the median is the midpoint of the list
Represented by the word median
Mode
In a frequency distribution, the mode is the score that has the greatest frequency
Bimodal
A distribution with two modes
Multimodal
Distribution with two or more modes
Major/minor Mode
When two modes have unequal frequencies, researchers occasionally differentiate the two values by calling the taller peak the major mode, and the shorter one the minor mode
Line graph
Point connected with a straight line.
Line graph is used when the values on the horizontal axis are measured on an interval or ratio scale
Symmetrical Distribution
Right hand side of the graph is a mirror image of the left side
Greek letter "mu"
