Coefficient of variation of two distributions are 50 and 60 and their arithmetic means are 30 and 25 respectively. Difference of their standard  deviation is 

Coefficient of variation of two distributions are 50 and 60 and their arithmetic means are 30 and 25 respectively. Difference of their standard  
deviation is 

  1. A

    0

  2. B

    1

  3. C

    1.5

  4. D

    2.5

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    Solution:

    Given, coefficient of variation, C2 = 50  and coefficient of variation, C2= 60 x¯1=30 and x¯2=25

    C=σx¯×10050=σ130×100σ1=15 and 60=σ225×100σ2=15 Required difference, σ1σ2=1515=0

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