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The mean of a distribution is 21 and the standard deviation is 7. What is the value of the coefficient variation?

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NTPC Tier I (Held On: 16 Apr 2016 Shift 3)
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  1. 16.66%
  2. 66.66%
  3. 33.33%
  4. 100%

Answer (Detailed Solution Below)

Option 3 : 33.33%
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Detailed Solution

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Concept:

The coefficient of variation is given by:  where σ is the standard deviation and  is the mean.

Calculation:

Given: Mean of distribution is 21 and the standard deviation is 7.

Here, σ = 7 and 

As we know that coefficient of variationis given by:  where σ is the standard deviation and  is the mean.

⇒ %

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