condition mean min max ZT0-3 0.2615063895 0.240233814 0.282778965 ZT4-7 0.02301369725 0.0159547755 0.030072619 ZT8-11 4.8955824547499995 0.379977129 9.411187780499999 ZT12-15 18.7489985775 14.941289525 22.55670763 ZT16-19 7.3052133472500005 5.087520806500001 9.522905888 ZT20-23 1.302202418 0.7719589465 1.8324458895