condition mean min max ZT0-3 27.031975000000003 24.6908 29.373150000000003 ZT4-7 17.30395 17.30395 17.30395 ZT8-11 40.42385 40.42385 40.42385 ZT12-15 0 0 0 ZT16-19 38.08965 38.08965 38.08965 ZT20-23 43.421949999999995 43.421949999999995 43.421949999999995