condition mean min max ZT0-3 201.277584 201.277584 201.277584 ZT4-7 201.07070850000002 201.07070850000002 201.07070850000002 ZT8-11 190.0764125 190.0764125 190.0764125 ZT12-15 214.3960995 214.3960995 214.3960995 ZT16-19 163.192201 163.192201 163.192201 ZT20-23 161.257448 161.257448 161.257448