condition mean min max ZT0-3 23.55752159 13.29834381 33.81669937 ZT4-7 42.4340302325 39.632254195 45.23580627 ZT8-11 27.2593142375 23.317121755 31.201506719999998 ZT12-15 13.278064472 9.6890088835 16.8671200605 ZT16-19 25.5121104 23.318638845000002 27.705581955 ZT20-23 29.2191698925 28.974739104999998 29.46360068