LaTeX
H=\frac{n}{\sum_{i=1}^{n}1/x_i}Variables
- xᵢ: positive values
- n: count
How to use this formula
Averages positive rates or ratios.
Important notes
- Appropriate when equal distances are traveled at different speeds.
Quick example
Harmonic mean of 2 and 3 is 2.4.
Applicability, worked calculation, and verification
Assumptions and domain checks
- Appropriate when equal distances are traveled at different speeds.
- For the Harmonic Mean, every denominator must be nonzero, and the numerator and denominator must remain correctly grouped.
- For the Harmonic Mean, the index variable, lower bound, upper bound, and any empty-sum or empty-product convention must be clear.
- For the Harmonic Mean, identify whether each quantity is a sample statistic, population parameter, estimator, or model value, and check the method assumptions.
Worked example
Harmonic mean of 2 and 3 is 2.4.
Common mistakes
- When copying Harmonic Mean, keep the complete numerator and denominator grouped; a missing brace or parenthesis changes the result.
- For the Harmonic Mean, do not interpret a descriptive statistic as a causal or population conclusion without the sampling and model assumptions.
Continue the workflow
Use Harmonic Mean in your own work
- Check the domainMatch the variables and assumptions to the problem before substituting values.
- Copy the exact notationPreserve grouping, signs, and exponents in
H=\frac{n}{\sum_{i=1}^{n}1/x_i}. - Edit or convertOpen the expression in the LaTeX editor, then export it for your document or web page.
Review and verification
Last reviewed: 2026-07-23
Automated quality check: Kept noindex until the missing evidence is supplied.
Formula references
- Introductory Statistics 2eOpenStax, Rice University — Reviewed probability and statistics definitions, notation, and formulas.
Frequently asked questions
What is the Harmonic Mean used for?
Averages positive rates or ratios.
Can I copy this formula as LaTeX?
Yes. Copy H=\frac{n}{\sum_{i=1}^{n}1/x_i} or open it in the LaTeX editor.
What should I check before using it?
Confirm that each variable, unit, domain restriction, and assumption matches the problem.