condition mean min max ZT0-3 2.3764875 2.251175 2.5018000000000002 ZT4-7 0.29100024999999996 0.29100024999999996 0.29100024999999996 ZT8-11 0.576381 0.576381 0.576381 ZT12-15 0 0 0 ZT16-19 0.7994055 0.7994055 0.7994055 ZT20-23 0.52125 0.52125 0.52125