condition mean min max ZT0-3 0.024925166666666665 0.024925166666666665 0.024925166666666665 ZT4-7 0.04864515 0.04864515 0.04864515 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.010523900000000001 0.010523900000000001 0.010523900000000001 ZT20-23 0.018368199999999998 0.018368199999999998 0.018368199999999998