condition mean min max ZT0-3 44.8190430075 39.34938132 50.288704695 ZT4-7 57.803097124999994 52.359440504999995 63.24675374499999 ZT8-11 43.454375295 36.65309848 50.25565211 ZT12-15 47.164306874999994 41.988742415 52.339871335 ZT16-19 73.7755716375 71.01588371 76.53525956499999 ZT20-23 85.00329451750001 83.89231888500001 86.11427015000001