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mmb65
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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
  openended distributions
  ordinal scale

when to use the mode
  nominal scales
  discrete variables
  describing shape

