condition mean min max ZT0-3 46.8548125275 43.413414565 50.29621049 ZT4-7 26.6422390575 24.845199725 28.43927839 ZT8-11 51.5458153375 33.89618907 69.195441605 ZT12-15 81.87685372249999 75.27038110999999 88.483326335 ZT16-19 80.1862634925 74.66682839 85.705698595 ZT20-23 67.04112614499999 64.188602265 69.893650025