condition mean min max ZT0-3 1392.8000000000002 1392.8000000000002 1392.8000000000002 ZT4-7 854.2 854.2 854.2 ZT8-11 905.7 905.7 905.7 ZT12-15 921.1500000000001 921.1500000000001 921.1500000000001 ZT16-19 1223.9 1223.9 1223.9 ZT20-23 1419.9 1419.9 1419.9