www.gusucode.com > stats 源码程序 matlab案例代码 > stats/TestDataforEqualVariancesExample.m
%% Test Data for Equal Variances %% % 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|. vartestn(grades) %% % The low $p$-value, |p = 0|, 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.