condition mean min max ZT0-3 0.6457378333333333 0.5420645 0.7377795 ZT4-7 0.9173195000000001 0.9173195000000001 0.9173195000000001 ZT8-11 0.319554 0.319554 0.319554 ZT12-15 0.710153 0.3278215 1.0924845 ZT16-19 1.4253505 1.4253505 1.4253505 ZT20-23 0.9074125 0.9074125 0.9074125