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If the coefficient of variation of two distribution are 50 ,60 and their arithmetic means are 30 and 25 respectively then the difference of their standard deviation is |
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Answer» Correct Answer - A Here `CV_(1)=50, CV_(2)=60, barx=30 " and " barx_(2)=25` `therefore " " CV_(1)=(sigma_(1))/(barx_(1))xx100 rArr 50 =sigma_(1)/30xx100` `sigma_(1)=(30xx50)/(100)=15 " and " CV_(2)=(sigma)^(2)/(barx_(2))xx100` `rArr " " 60=((sigma)_(2))/25xx100` `therefore " " sigma_(2)=(60xx25)/100=15` `sigma_(1)-sigma_(2)=15-15=0` |
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