Curriculum
Statistics — Third Secondary
Unit 1: Correlation and Regression
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Unit 2: Advanced Statistical Measures
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Unit 3: Probability
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Unit 4: Random Variables
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Unit 5: The Normal Distribution
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Text lesson
Advanced Measures of Dispersion
Advanced Measures of Dispersion
The coefficient of variation for comparison
The coefficient of variation for comparison
- The coefficient of variation is a relative measure of spread. It is calculated by:
Coefficient of variation = (σ ÷ x̄) × 100%
- It is used when we compare the spread of two data sets with different units, or with very different means, because the standard deviation alone can be misleading.
- The data set with the smaller coefficient of variation is relatively more consistent.
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