www.gusucode.com > stats 源码程序 matlab案例代码 > stats/TestforEqualVariancesUsingtheBrownForsytheTestExample.m
%% Test for Equal Variances Using the Brown-Forsythe Test %% % Load the sample data. load examgrades %% % Test the null hypothesis that the variances are equal across the five % columns of data in the students’ exam grades matrix, |grades|, using the % Brown-Forsythe test. Suppress the display of the summary table of statistics % and the box plot. [p,stats] = vartestn(grades,'TestType','BrownForsythe','Display','off') %% % The small $p$-value, |p = 1.3121e-06|, indicates that |vartestn| rejects % the null hypothesis that the variances are equal across all five columns, % in favor of the alternative hypothesis that at least one column has a % different variance.