Impact of Outlying Scores On The Mean

Notice that changing an outlying score changes the mean but the median and mode remain the same.

X                    Y
7                 700
6                     6
5                     5
5                     5
5                     5
4                     4
3                     3

The mean of variable X is 5. But the mean of the Y is 104.

Obviously, means are very sensitive to all of the scores in a distribution. Means are very democratic; every score has a say.

NOW YOU CHOOSE:
   Day 2: Central Tendency
   A Bit More About Central Tendency
   Even More About Central Tendency
   More Examples
      More Mean Examples
      More Median Examples
      Median Is Middle Of Distribution
      More Mode Examples
   Impact of Outlying Scores
      On The Mean
      On The Median
      On The Mode
   How To Calculate Central Tendency
      Calculating The Mean
      Calculating The Median
      When There’s No Middle-Most Score
      Calculating The Mode
   Formulas For Central Tendency
   Basic Facts About Central Tendency
   Vocabulary
   Quiz 2
   Summary