condition mean min max ZT0-3 2.5886175 1.775085 3.40215 ZT4-7 0.3942135 0.3942135 0.3942135 ZT8-11 0.197787 0.197787 0.197787 ZT12-15 0 0 0 ZT16-19 2.9544650000000003 2.9544650000000003 2.9544650000000003 ZT20-23 0.78757 0.78757 0.78757