John's Measures of Central Tendency

Wednesday, October 1, 2008

Mean

  • Arrange data in ascending numerical order.
  • Divide the sum of all of the numbers in that set of data by how many numbers there are.


Median

  • Arrange data in ascending numerical order.
  • Find the middle number by crossing of the end numbers until you have one or two numbers left.
  • If you have two numbers left, add both of those numbers together and then divide that number by two.
  • If you have one more number left, you have got your median.
  • Great to use if there is an outlier.


Mode


  • Arrange data in ascending numerical order.
  • you can have more than one mode or no mode at all.






Range

  • Arrange data in ascending numerical number.
  • Subtract the largest piece of that from the smallest.
  • If you have a large range there is a possibility that you have an outlier.


Here is a video of Mean Median and Mode . . .































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