condition mean min max ZT0-3 1053.8000000000002 1053.8000000000002 1053.8000000000002 ZT4-7 931.4 931.4 931.4 ZT8-11 1077.8000000000002 1077.8000000000002 1077.8000000000002 ZT12-15 1147.1 1147.1 1147.1 ZT16-19 1096.95 1096.95 1096.95 ZT20-23 1061.45 1061.45 1061.45