condition mean min max ZT0-3 1701.25 1701.25 1701.25 ZT4-7 1645.6 1645.6 1645.6 ZT8-11 1186.0 1186.0 1186.0 ZT12-15 1215.4 1215.4 1215.4 ZT16-19 1286.9499999999998 1286.9499999999998 1286.9499999999998 ZT20-23 1755.1 1755.1 1755.1