Multiple choice

In a series of observations, S.D.$=7$ and mean is $28$, the coefficient of variation is

  1. $4$
  2. $1/4$
  3. $25$
  4. $12.5$
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C Correct answer
Explanation

Coefficient of Variation (CV) = (Standard Deviation / Mean) * 100. CV = (7 / 28) * 100 = (1/4) * 100 = 25.

AI explanation

Use the formula for the coefficient of variation, which equals the standard deviation divided by the mean, all multiplied by 100. Substitute the given standard deviation of 7 and the mean of 28 into the formula to calculate (7 / 28) * 100. This simplifies to (1 / 4) * 100, resulting in 25.

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