condition mean min max ZT0-3 0.04958315 0.0 0.1187975 ZT4-7 0.02827 0.02827 0.02827 ZT8-11 0.02873355 0.02873355 0.02873355 ZT12-15 0.089946625 0.08843085 0.0914624 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0301788 0.0301788 0.0301788