condition mean min max ZT0-3 100.8 100.8 100.8 ZT4-7 931.2 931.2 931.2 ZT8-11 1163.75 1163.75 1163.75 ZT12-15 786.05 786.05 786.05 ZT16-19 241.79999999999998 241.79999999999998 241.79999999999998 ZT20-23 221.8 221.8 221.8