condition mean min max ZT0-3 139.801789 139.801789 139.801789 ZT4-7 112.65688650000001 112.65688650000001 112.65688650000001 ZT8-11 125.5126745 125.5126745 125.5126745 ZT12-15 137.2181085 137.2181085 137.2181085 ZT16-19 178.18307800000002 178.18307800000002 178.18307800000002 ZT20-23 197.488499 197.488499 197.488499