condition mean min max ZT0-3 28.126675000000002 23.2147 33.038650000000004 ZT4-7 32.76045 32.76045 32.76045 ZT8-11 77.1161 77.1161 77.1161 ZT12-15 0 0 0 ZT16-19 91.24504999999999 91.24504999999999 91.24504999999999 ZT20-23 46.2485 46.2485 46.2485