condition mean min max ZT0-3 28.7202 20.655549999999998 34.28275 ZT4-7 27.2409355 27.2409355 27.2409355 ZT8-11 19.37645 19.37645 19.37645 ZT12-15 26.764892500000002 21.417535 32.11225 ZT16-19 37.3846 37.3846 37.3846 ZT20-23 8.462559149999999 8.462559149999999 8.462559149999999