tab_text (tbl, n_cols - 2, 0, TAB_CENTER | TAT_TITLE, _("Statistic"));
tab_text (tbl, n_cols - 1, 0, TAB_CENTER | TAT_TITLE, _("Std. Error"));
tab_text (tbl, n_cols - 2, 0, TAB_CENTER | TAT_TITLE, _("Statistic"));
tab_text (tbl, n_cols - 1, 0, TAB_CENTER | TAT_TITLE, _("Std. Error"));