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
Card Set Information
Author:
mmb65
ID:
33816
Filename:
Ch. 3 stats
Updated:
2010-09-10 14:28:29
Tags:
PSYC
Folders:
Description:
definitions from chapter 3
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