condition mean min max ZT0-3 51.6238 51.6238 51.6238 ZT4-7 40.60325 40.60325 40.60325 ZT8-11 40.94025 40.94025 40.94025 ZT12-15 50.831450000000004 50.831450000000004 50.831450000000004 ZT16-19 63.454800000000006 63.454800000000006 63.454800000000006 ZT20-23 54.81175 54.81175 54.81175