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Two teams A and B have the same mean and...

Two teams A and B have the same mean and their coefficients of variance are 4, 2 respectively. If `sigma_(A), sigma_(B)` are the standard deviations of teams A, B respectively then the relation between item is

A

`sigma_(A)=sigma_(B)`

B

`sigma_(B)=2sigma_(A)`

C

`sigma_(A)=2sigma_(B)`

D

`sigma_(B)=4sigma_(A)`

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