condition mean min max ZT0-3 0.007896816666666667 0.0 0.015972300000000002 ZT4-7 0.029747799999999998 0.029747799999999998 0.029747799999999998 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0077401 0.0 0.0154802 ZT16-19 0.0369498 0.0369498 0.0369498 ZT20-23 0.0329208 0.0329208 0.0329208