condition mean min max ZT0-3 29.184437165 16.30193525 42.06693908 ZT4-7 49.2124096175 48.038971155 50.38584808 ZT8-11 26.68988599125 17.4752303425 35.904541640000005 ZT12-15 3.3930341315000003 2.6663340935 4.1197341695 ZT16-19 4.91367596375 4.2908304305 5.536521497 ZT20-23 3.9354545655 3.76252953 4.108379601