Johnray measures of central Tendancy.

Monday, September 29, 2008

  • The sum of a set of values divided by the number of values in the set.
  • Arrange the data in ascending order.


  • The middle number in a set of data after have been arranged in order.
  • The median is a measure of central tendency that describes the middle of the set
    of data.


  • The mode is the most frequently occurring value in a set of data.
  • The item in a list of numbers that appears most often is the mode. For example:


  • The range of a set of data is the difference between the highest and lowest values in the set.
  • Range is obtained by taking the difference of the maximum and minimum values of a given data set.


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