condition mean min max ZT0-3 0.017587652250000002 0.0 0.035175304500000004 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.009964415999999999 0.0 0.019928831999999997 ZT16-19 0.0 0.0 0.0 ZT20-23 0.021008215333333333 0.0 0.04201643066666667