condition mean min max ZT0-3 0.0516945 0.0 0.103389 ZT4-7 0.20756049999999998 0.20756049999999998 0.20756049999999998 ZT8-11 33.8418 33.8418 33.8418 ZT12-15 0 0 0 ZT16-19 0.814629 0.814629 0.814629 ZT20-23 1.1275995 1.1275995 1.1275995