condition mean min max ZT0-3 958.1 958.1 958.1 ZT4-7 715.4 715.4 715.4 ZT8-11 866.25 866.25 866.25 ZT12-15 772.95 772.95 772.95 ZT16-19 1087.0 1087.0 1087.0 ZT20-23 1203.3000000000002 1203.3000000000002 1203.3000000000002