Which of the following statements about statistical concepts is least accurate?
A) The coefficient of variation is useful when comparing dispersion of data measured in different units or having large differences in their means.
B) For a normal distribution, only 95% of the observations lie within ±3 standard deviations from the mean.
C) For any distribution, based on Chebyshev's Inequality, 75% of the observations lie within ±2 standard deviations from the mean.
Answer: B