condition mean min max ZT0-3 463.8 463.8 463.8 ZT4-7 618.1 618.1 618.1 ZT8-11 539.9 539.9 539.9 ZT12-15 374.95 374.95 374.95 ZT16-19 330.45000000000005 330.45000000000005 330.45000000000005 ZT20-23 456.35 456.35 456.35