condition mean min max ZT0-3 127.098347 127.098347 127.098347 ZT4-7 198.819108 198.819108 198.819108 ZT8-11 101.5889225 101.5889225 101.5889225 ZT12-15 61.4830635 61.4830635 61.4830635 ZT16-19 40.682045 40.682045 40.682045 ZT20-23 43.451805 43.451805 43.451805