condition mean min max ZT0-3 1224.8 1224.8 1224.8 ZT4-7 1112.9 1112.9 1112.9 ZT8-11 1065.5 1065.5 1065.5 ZT12-15 1255.4 1255.4 1255.4 ZT16-19 1581.75 1581.75 1581.75 ZT20-23 1533.25 1533.25 1533.25