condition mean min max ZT0-3 1150.8000000000002 1150.8000000000002 1150.8000000000002 ZT4-7 1309.7 1309.7 1309.7 ZT8-11 1261.65 1261.65 1261.65 ZT12-15 1512.8000000000002 1512.8000000000002 1512.8000000000002 ZT16-19 1511.4 1511.4 1511.4 ZT20-23 1360.65 1360.65 1360.65