condition mean min max ZT0-3 42.9507 42.9507 42.9507 ZT4-7 17.07115 17.07115 17.07115 ZT8-11 11.175 11.175 11.175 ZT12-15 17.75925 17.75925 17.75925 ZT16-19 41.5112 41.5112 41.5112 ZT20-23 46.6719 46.6719 46.6719