condition mean min max ZT0-3 0.7637117499999999 0.7548174999999999 0.7726059999999999 ZT4-7 1.4525700000000001 1.4525700000000001 1.4525700000000001 ZT8-11 1.0345005 1.0345005 1.0345005 ZT12-15 0 0 0 ZT16-19 1.4522499999999998 1.4522499999999998 1.4522499999999998 ZT20-23 0.870118 0.870118 0.870118