condition mean min max ZT0-3 68.3977086675 66.80221191 69.993205425 ZT4-7 89.0917867825 74.44357167999999 103.740001885 ZT8-11 127.657677975 110.20999235 145.1053636 ZT12-15 53.68948715 22.344767065 85.034207235 ZT16-19 14.913424279500001 12.174187254 17.652661305000002 ZT20-23 5.88390880625 4.7343038 7.033513812500001