connect_action (de, "oneway-anova", G_CALLBACK (oneway_anova_dialog));
connect_action (de, "indep-t-test", G_CALLBACK (t_test_independent_samples_dialog));
connect_action (de, "oneway-anova", G_CALLBACK (oneway_anova_dialog));
connect_action (de, "indep-t-test", G_CALLBACK (t_test_independent_samples_dialog));