condition mean min max ZT0-3 26.806350000000002 24.098100000000002 29.5146 ZT4-7 14.76685 14.76685 14.76685 ZT8-11 10.930299999999999 10.930299999999999 10.930299999999999 ZT12-15 0 0 0 ZT16-19 15.98455 15.98455 15.98455 ZT20-23 23.0541 23.0541 23.0541