What is the formula for finding the coefficient of variation,given $\sigma = \text{standard deviation}$ and $\bar{x} = \text{mean} \neq 0$?
- A$\frac{\bar{x}}{\sigma} \times 100$
- B$\frac{\bar{x}}{\sigma}$
- C$\frac{\sigma}{\bar{x}}$
- D$\frac{\sigma}{\bar{x}} \times 100$
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