NDA 2017 Mathematics question

Consider the following statements : 1. Coefficient of variation depends on the unit of measurement of the variable. 2. Range is a measure of dispersion. 3. Mean deviation is least when measured about median. Which of the above statements are correct?

(A)1 and 2 only
(B)2 and 3 onlyCorrect
(C)1 and 3 only
(D)1, 2 and 3

Answer: (B)

Solution

The coefficient of variation is a ratio of two quantities in the same unit, so it is a pure number independent of the unit

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Question ID VK-028796