condition mean min max ZT0-3 0.019759783333333333 0.01887775 0.02028635 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0193873 0.0193873 0.0193873 ZT12-15 0.0499283 0.04049345 0.05936315 ZT16-19 0.01879685 0.01879685 0.01879685 ZT20-23 0.12415095 0.12415095 0.12415095