condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.008091419 0.0 0.016182838 ZT8-11 0.036637480666666666 0.023625968666666664 0.04964899266666667 ZT12-15 0.009964415999999999 0.0 0.019928831999999997 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0