condition mean min max ZT0-3 0.016021439250000002 0.0 0.032042878500000004 ZT4-7 0.033045928749999995 0.03085347 0.035238387499999996 ZT8-11 0.07586861325000001 0.057306459000000004 0.09443076750000001 ZT12-15 0.11131333175000001 0.0807553315 0.14187133200000002 ZT16-19 0.09942452375 0.085433081 0.11341596649999999 ZT20-23 0.1596650525 0.12779992299999998 0.191530182