condition mean min max ZT0-3 0.39219075000000003 0.0 0.7843815000000001 ZT4-7 0.0 0.0 0.0 ZT8-11 0.55127 0.55127 0.55127 ZT12-15 0.39808825 0.0 0.7961765 ZT16-19 0.49256083333333334 0.385968 0.5991536666666667 ZT20-23 0 0 0