Merits and Demerits of Mean Deviation


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Merits:

  • Mean deviation is easy to calculate. This measure is simple to
understand.
  • This can be calculated from any average.
  • Its value is based upon all the (observations) items of the data.
  • It is less affected by extreme observations.
  • It gives us an idea about how the items are situated in the distribution.

Demerits:

  • This is mathematically incomplete because it ignores negative signs.
  • As it can be calculated from any average, it does not have certainty (i.e., it is not a well defined measure).
  • Its use is very limited in statistical work.


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