condition mean min max ZT0-3 0.12085571666666667 0.10490415 0.1461461 ZT4-7 0.08816165000000001 0.08816165000000001 0.08816165000000001 ZT8-11 0.09068649999999999 0.09068649999999999 0.09068649999999999 ZT12-15 0.034773725 0.0281747 0.04137275 ZT16-19 0.03720405 0.03720405 0.03720405 ZT20-23 0.06977005 0.06977005 0.06977005