Variation defines how much changes are happening in an output of a process.

There are 4 ways of measuring variations

  • Mean - variations are measured and compared by using mathematics averaging technique.


  • Median - It is a mid point in a range of data.It is calculated by finding the difference between highest and lowest vale n then division by two and finally add the lowest value to it.


  • Mode- it is the most time of occurred values in a data range.


  • Range - variations are measured as difference between highest and lowest values in particular data range.








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