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A data set has mean 25 and standard deviation 4. Find its coefficient of variation, as a percent.

Competition practiceData & Probability
  • A25
  • B6.25
  • C20
  • D16

Step-by-Step Solution

Coefficient of variation = (standard deviation ÷ mean) × 100 = (4 ÷ 25) × 100 = 16 percent. Inverting the fraction gives 6.25, which measures nothing useful here.
Answer: D) 16

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