condition mean min max ZT0-3 8.97250415475 5.8725843495 12.07242396 ZT4-7 3.54237448 3.127227244 3.9575217159999996 ZT8-11 8.971664774250002 5.574303978 12.369025570500002 ZT12-15 13.213403634999999 13.198792145 13.228015124999999 ZT16-19 15.318645505000001 14.92153893 15.715752080000001 ZT20-23 12.0670573725 11.910382760000001 12.223731985