condition mean min max ZT0-3 1.9616125 1.6118649999999999 2.31136 ZT4-7 1.8614199999999999 1.8614199999999999 1.8614199999999999 ZT8-11 0.80686 0.80686 0.80686 ZT12-15 0 0 0 ZT16-19 1.6198275 1.6198275 1.6198275 ZT20-23 3.17989 3.17989 3.17989