condition mean min max ZT0-3 151.526034 151.526034 151.526034 ZT4-7 88.166528 88.166528 88.166528 ZT8-11 67.5794625 67.5794625 67.5794625 ZT12-15 80.6056515 80.6056515 80.6056515 ZT16-19 111.0583695 111.0583695 111.0583695 ZT20-23 188.992435 188.992435 188.992435