condition mean min max ZT0-3 41.8534 41.8534 41.8534 ZT4-7 37.3986 37.3986 37.3986 ZT8-11 37.1279 37.1279 37.1279 ZT12-15 40.32415 40.32415 40.32415 ZT16-19 36.505300000000005 36.505300000000005 36.505300000000005 ZT20-23 42.805 42.805 42.805