LaTeX Chi (χ) - Complete Guide
The Greek letter chi (χ) is used in statistics (chi-squared test), physics, and mathematics.
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Chi
LaTeX Code
No package required
\chiStandard chi symbol
What is the LaTeX Chi?
Chi is the twenty-second letter of the Greek alphabet. It is most famous for appearing in the chi-squared (χ²) statistical test used in hypothesis testing. It also appears in various mathematical and physical contexts.
How to Use Chi in LaTeX
Method 1: Using \chi
✅No package required
Standard chi symbol
Example: Using \chi
\documentclass{article}
\begin{document}
% Using the Chi
Text with \chi
\end{document}Common Use Cases
The Chi symbol is commonly used in the following contexts:
Chi-Squared Test
Used for chi-squared statistical test.
Code
Chi-squared statistic: $\chi^2 = \sum \frac{(O-E)^2}{E}$Output
Chi-squared statistic: χ² = Σ(O-E)²/E
Magnetic Susceptibility
Used in physics for magnetic properties.
Code
Magnetization: $M = \chi H$Output
Magnetization: M = χH
Complete Examples
Chi-Squared Distribution
Chi-squared distribution example
\documentclass{article}
\begin{document}
The chi-squared test statistic follows a $\chi^2$ distribution with $k$ degrees of freedom.
\end{document}Frequently Asked Questions
Which method should I use?
We recommend using the method marked as "Recommended" above. However, the best method depends on your specific needs:
- \chi: Standard chi symbol
Where do I use this symbol?
This symbol can be used:
- In mathematical equations (math mode)
- In regular text (if using text mode)
- In various document environments
Can I use this in display mode?
Yes, symbols that work in math mode (between $ $) also work in display mode (between $$ $$). This allows you to display the symbol on its own line with larger formatting.
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