condition mean min max ZT0-3 0.0013079783333333334 0.001295385 0.001322185 ZT4-7 0.001229665 0.001229665 0.001229665 ZT8-11 0.001223165 0.001223165 0.001223165 ZT12-15 6.897961067500001 5.93019679 7.865725345 ZT16-19 14.849149999999998 14.849149999999998 14.849149999999998 ZT20-23 6.30765263 6.30765263 6.30765263