alleryA measure of variability independent of units is the coefficient of:
ACorrelation
BFriction
CExpansion
DVariation
Answer & Solution
Correct answer: D. Variation
1. Comparing series in different units needs a unitless measure.
2. One such measure divides dispersion by the mean.
3. It is the coefficient of variation.
_Source: syllabus Mathematics, Chapter 15, Statistics._
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