condition mean min max ZT0-3 104.684255 104.684255 104.684255 ZT4-7 170.5431165 170.5431165 170.5431165 ZT8-11 141.164547 141.164547 141.164547 ZT12-15 161.599314 161.599314 161.599314 ZT16-19 167.8424995 167.8424995 167.8424995 ZT20-23 151.495948 151.495948 151.495948