condition mean min max ZT0-3 147.462826 147.462826 147.462826 ZT4-7 120.883955 120.883955 120.883955 ZT8-11 125.88728549999999 125.88728549999999 125.88728549999999 ZT12-15 127.7109155 127.7109155 127.7109155 ZT16-19 149.6692865 149.6692865 149.6692865 ZT20-23 157.13759299999998 157.13759299999998 157.13759299999998