condition mean min max ZT0-3 40.698899999999995 40.698899999999995 40.698899999999995 ZT4-7 37.2266 37.2266 37.2266 ZT8-11 27.241500000000002 27.241500000000002 27.241500000000002 ZT12-15 35.305 35.305 35.305 ZT16-19 38.1576 38.1576 38.1576 ZT20-23 36.6047 36.6047 36.6047