condition mean min max ZT0-3 1011.95 1011.95 1011.95 ZT4-7 580.5 580.5 580.5 ZT8-11 553.15 553.15 553.15 ZT12-15 935.6 935.6 935.6 ZT16-19 1316.8000000000002 1316.8000000000002 1316.8000000000002 ZT20-23 1193.05 1193.05 1193.05