condition mean min max ZT0-3 907.45 907.45 907.45 ZT4-7 1203.6 1203.6 1203.6 ZT8-11 1204.1 1204.1 1204.1 ZT12-15 1839.4 1839.4 1839.4 ZT16-19 1258.3 1258.3 1258.3 ZT20-23 857.1 857.1 857.1