condition mean min max ZT0-3 23.382350000000002 23.382350000000002 23.382350000000002 ZT4-7 29.428849999999997 29.428849999999997 29.428849999999997 ZT8-11 12.9788 12.9788 12.9788 ZT12-15 7.315989999999999 7.315989999999999 7.315989999999999 ZT16-19 7.216815 7.216815 7.216815 ZT20-23 16.565549999999998 16.565549999999998 16.565549999999998