condition mean min max ZT0-3 0.50673075 0.319585 0.6938765 ZT4-7 0.8300965 0.8300965 0.8300965 ZT8-11 1.3395545 1.3395545 1.3395545 ZT12-15 0 0 0 ZT16-19 0.6595375 0.6595375 0.6595375 ZT20-23 0.5686985 0.5686985 0.5686985