condition mean min max ZT0-3 40.3688 25.030900000000003 63.91985 ZT4-7 45.03965 45.03965 45.03965 ZT8-11 32.184 32.184 32.184 ZT12-15 44.994225 42.9306 47.05785 ZT16-19 29.0305 29.0305 29.0305 ZT20-23 26.7322 26.7322 26.7322