condition mean min max ZT0-3 72.3674 72.3674 72.3674 ZT4-7 65.999 65.999 65.999 ZT8-11 60.312650000000005 60.312650000000005 60.312650000000005 ZT12-15 54.286550000000005 54.286550000000005 54.286550000000005 ZT16-19 54.569100000000006 54.569100000000006 54.569100000000006 ZT20-23 54.23595 54.23595 54.23595