condition mean min max ZT0-3 1345.5 1345.5 1345.5 ZT4-7 1142.0 1142.0 1142.0 ZT8-11 1341.5500000000002 1341.5500000000002 1341.5500000000002 ZT12-15 1356.9499999999998 1356.9499999999998 1356.9499999999998 ZT16-19 1392.6 1392.6 1392.6 ZT20-23 1025.8000000000002 1025.8000000000002 1025.8000000000002