condition mean min max ZT0-3 0.15260481666666664 0.058172299999999996 0.20815699999999998 ZT4-7 0.07152625 0.07152625 0.07152625 ZT8-11 0.369179 0.369179 0.369179 ZT12-15 0.75158825 0.5854820000000001 0.9176945 ZT16-19 0.5077975 0.5077975 0.5077975 ZT20-23 0.5541415000000001 0.5541415000000001 0.5541415000000001