condition mean min max ZT0-3 6.0533427372499995 3.673318744 8.4333667305 ZT4-7 5.22879067725 4.775694999000001 5.6818863555 ZT8-11 24.13602721425 11.444712878499999 36.82734155 ZT12-15 93.17730893500001 80.44597871 105.90863916 ZT16-19 111.92810851 93.30362867 130.55258835 ZT20-23 37.3401588475 28.06968498 46.610632715