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    Question

    The most appropriate measure to compare the consistency

    of two series is -
    A Standard deviation Correct Answer Incorrect Answer
    B Mean deviation Correct Answer Incorrect Answer
    C Coefficient variation Correct Answer Incorrect Answer
    D Range Correct Answer Incorrect Answer

    Solution

    The Coefficient of Standard Deviation or Coefficient of Variation is a relative measure of dispersion given by Coefficient of Standard Deviation =     (Standard Deviation)/ ( Mean )* 100 =   σ / x ̄    * 100 It’s a pure number and can be used to compare the variability of 2 distributions expressed in different units. It is mainly used to compare measurements that use different units or when means are vastly different.  

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