Calcolatore Test di Levene
Verifica l'uguaglianza delle varianze tra gruppi con il test di Levene.
Levene W
3.5625
df12
df257
Levene W vs Total N
Formula
Levene Test
W = [(N-k)/(k-1)] * [SS_between/SS_within]
Tests equal variances using absolute deviations from group means.
Esempio Risolto
N=60, 3 groups.
- 01W = (57/2) * (15/120) = 3.56
Domande Frequenti
Why vs Bartlett?
More robust to non-normality.
When needed?
Before ANOVA or t-tests assuming equal variances.
Brown-Forsythe?
Uses medians instead of means; even more robust.
Impara