condition mean min max ZT0-3 0.60386575 0.5705975000000001 0.637134 ZT4-7 0.4071935 0.4071935 0.4071935 ZT8-11 1.160425 1.160425 1.160425 ZT12-15 0 0 0 ZT16-19 0.9683895 0.9683895 0.9683895 ZT20-23 0.858626 0.858626 0.858626