condition mean min max ZT0-3 8.020081166666667 0.2482435 13.24605 ZT4-7 0.6581465 0.6581465 0.6581465 ZT8-11 25.36945 25.36945 25.36945 ZT12-15 59.96865 53.125 66.8123 ZT16-19 47.1459 47.1459 47.1459 ZT20-23 36.87995 36.87995 36.87995