condition mean min max ZT0-3 1.64975112075 1.3005334364999999 1.998968805 ZT4-7 8.5546138895 5.6179671739999995 11.491260605 ZT8-11 13.96057744375 13.663205074499999 14.257949813 ZT12-15 40.777624880000005 33.170241000000004 48.385008760000005 ZT16-19 41.7114556275 36.33419839 47.088712865000005 ZT20-23 91.0039418825 64.33011607 117.677767695