condition mean min max ZT0-3 53.9228512225 31.879124595 75.96657785 ZT4-7 10.05186206275 8.636520987499999 11.467203138 ZT8-11 6.1312580287500005 5.4312648555 6.831251202 ZT12-15 37.3176941085 21.546847017 53.088541199999995 ZT16-19 53.8662937025 49.541769795 58.19081761 ZT20-23 98.76186792000001 70.854667545 126.66906829500002