Answer to Question #270939 in Statistics and Probability for joy

Question

If the mean score in a STAT 1 examination is 56 and the variance is 4. What is the coefficient of variation

Answer 1

$$CV= \dfrac{\sigma}{\mu} \cdot 100\%=\dfrac{\sqrt{4}}{56}\cdot 100\%$$

$$=\dfrac{25}{7}\%\approx3.5714\%$$