Levene test calculator
Paste equally defined independent groups; optional fields may stay empty.
Group dispersion
Compare group dispersion.
Group summary
| Group | n | Center | Variance / deviation |
|---|---|---|---|
| Fill in the fields above — the result is computed on this page. | |||
How do I use this page?
- Paste groups.
- Read the statistic and p-value.
What this page does not do: Bartlett is sensitive to non-normality; Levene and Brown–Forsythe are generally more robust.
Further reading
Theory — what is the Levene test?
The Levene test checks whether independent groups have similar variance, an assumption often required by other statistical tests. For every observation, the absolute deviation from its group's center is computed, and these deviations are then compared using an F statistic. The choice of variant depends on the data — the Brown–Forsythe version is a practical, robust default, while the classic Bartlett version suits roughly normal data better.
Frequently asked questions
Which test should I use?
See also
A/B test calculator
Compare two proportions in an A/B test. Calculate conversion rates, difference, uplift, z score, p value and c
A/B test planning — sample size, MDE and duration
Plan a two-proportion experiment, estimate detectable effect and traffic duration.
ACF and PACF autocorrelation calculator
Calculate ACF and PACF across time-series lags. Review the chart, reference bounds and coefficient table.