condition mean min max ZT0-3 51.449993032500004 25.492557845 77.40742822 ZT4-7 36.8209076475 29.079422535 44.56239276 ZT8-11 72.693276355 57.269853725000004 88.116698985 ZT12-15 56.337863459999994 41.220191785 71.45553513499999 ZT16-19 29.2534931625 24.500262305 34.00672402 ZT20-23 22.5457949075 22.414846025 22.67674379