Are the Standard Deviations Equal? Figure 12.10 shows output of the modified Levene’s test for the Facebook friends study. In JMP, the test is called Brown-Forsythe. The P-value is 0.0554, which is larger than ⍺ = 0.05, suggesting we cannot reject the null hypothesis that they are the same. This result further supports the use of ANOVA for the Facebook friends study.