Nicko's Measure of Central Tendency

Friday, October 3, 2008
The sum of the values divided by the number of values--usually called the "average."
  • Place in ascending order
  • Add all of the numbers together
  • Divide by the number of values to get the mean

The median is the middle of a distribution: half the scores are above the median and half are below the median.
  • Place in ascending order
  • Remove the corner numbers, repeat this until left with one or two numbers
  • If left with one number, then that number is the mode
  • If left with two number, find their mean and the number you get is the mode


The most common number in a set of data. There can be multiple modes
  • Place in ascending order
  • Observe all the numbers, look for numbers that show up multiple time
  • Whichever number(s) show up, those are the mode(s)

The difference between the largest number to the smallest number in the data.
  • Place in ascending order
  • Find the smallest and the biggest number
  • Subtract the smallest from the biggest number to get the range

Here is a video on MMM


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