Central tendency.

  1. Mode: It is defined as the most frequent number of the data set.
  2. Median: It is defined as the middle number or average number in ordered data set.
  3. Mean: It is defined as the sum of all values divided by the total number of values in data set.


It is most frequent occur value in the data set, there are possibility to have no mode, one more or more than one mode.


The median is the middle score for a set of data that has been arranged in order of magnitude. The median is less affected by outliers and skewed data. In order to calculate the median, suppose we have the data below: 65,55,89,56,35,14,56,55,87,45,92


The arithmetic mean (or simply mean) of a list of numbers, is the sum of all of the numbers divided by the number of numbers. Similarly, the mean of a sample x1,x2,….Xn, usually denoted by X bar.



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