condition mean min max ZT0-3 81.97562500000001 68.21645 95.7348 ZT4-7 49.56345 49.56345 49.56345 ZT8-11 51.7504 51.7504 51.7504 ZT12-15 0 0 0 ZT16-19 85.95105 85.95105 85.95105 ZT20-23 56.189 56.189 56.189