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Ch. 3 stats
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central tendency
the statistical measure to determine a single score that defines the center of a distribution
mean
the sum of scores divided by the number of scores
characteristics of the mean (change the mean)
- changing a score
- introducing a new score or removing a score
- adding or subtracting a constant from each score
- multiplying or dividing each score by a constant
median
the midpoint of the scores listed from lowest to highest
mode
the score with the greatest frequesncy
when to use the median
- extreme scores or skewed distributions
-undetermined values
- open-ended distributions
- ordinal scale
when to use the mode
- nominal scales
- discrete variables
- describing shape
Author
mmb65
ID
33816
Card Set
Ch. 3 stats
Description
definitions from chapter 3
Updated
2010-09-10T14:28:29Z
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