condition mean min max ZT0-3 0.32361607724999997 0.2933034955 0.353928659 ZT4-7 0.37378128125 0.22690885249999998 0.5206537099999999 ZT8-11 2.50344410725 1.3722827785 3.634605436 ZT12-15 5.9936751375 4.9964470875 6.9909031875 ZT16-19 2.7649430222499998 2.275432297 3.2544537475 ZT20-23 0.991709274 0.800267921 1.183150627