void box_whisker_whiskers (const struct box_whisker *bw, double whiskers[2]);
-void box_whisker_hinges (const struct box_whisker *bw, double hinges[2]);
+void box_whisker_hinges (const struct box_whisker *bw, double hinges[3]);
const struct ll_list * box_whisker_outliers (const struct box_whisker *bw);