Frequently Asked Questions
What is the coefficient of variation?
The standard deviation divided by the mean (CV = σ/μ). It expresses spread relative to size and is unit-less.
When is CV meaningless?
When the mean is near zero, when data is on an interval (not ratio) scale, or when there are negative values without a meaningful zero.
What's a good CV?
Depends on field. Lab measurements often target CV < 5%; biological measurements 10-30% is typical; speculative finance can exceed 100%.
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This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.