condition mean min max ZT0-3 100.770524 100.770524 100.770524 ZT4-7 116.35088350000001 116.35088350000001 116.35088350000001 ZT8-11 118.1080235 118.1080235 118.1080235 ZT12-15 99.2427175 99.2427175 99.2427175 ZT16-19 81.7225185 81.7225185 81.7225185 ZT20-23 63.909951 63.909951 63.909951