Which data set has the greater relative variability?
Correct answer: C. Mean 80, standard deviation 12
- A. Mean 40, standard deviation 4
- B. Mean 60, standard deviation 6
- C. Mean 80, standard deviation 12
- D. Mean 100, standard deviation 9
Explanation
Relative variability is compared using the coefficient of variation. The coefficients are 10%, 10%, 15% and 9%, respectively, so the third data set is the most relatively variable.
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