Gelli's Measures of Central Tendency

Monday, September 29, 2008

Mean:

  • Arrange the data in ascending numerical order.

  • The sum of all data, divided by how many numbers there are in the data.


Median:

  • Arrange the data in ascending numerical order.

  • The middle number of the data.

  • If there are 2 numbers in the middle, add them together and divide by 2.

Mode:


  • Arrange the data in ascending numerical order.

  • The most common number.

Range:


  • Arrange the data in ascending numerical order.

  • Subtract the smallest data from the largest data.


Here is a video that explains MMM:

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