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Is a statistical measure to determine a single score that defines the center of a distribution.
: to find a score that is best representative of a entire group
Greek letter "mu"
Mean for sample
Is identified by
M or X
For a distribution is the sum of the scores divided by the number of scores
Combining two sets of scores
If the scores in a distribution are listed in order from smallest to largest, the median is the
of the list
Represented by the word median
In a frequency distribution, the mode is the score that has the greatest frequency
A distribution with two modes
Distribution with two or more modes
When two modes have unequal frequencies, researchers occasionally differentiate the two values by calling the taller peak the
, and the shorter one the
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
Right hand side of the graph is a mirror image of the left side
A distribution that is skewed either + or -