condition mean min max ZT0-3 1407.7 1407.7 1407.7 ZT4-7 1042.5 1042.5 1042.5 ZT8-11 1048.3000000000002 1048.3000000000002 1048.3000000000002 ZT12-15 1269.5500000000002 1269.5500000000002 1269.5500000000002 ZT16-19 1405.75 1405.75 1405.75 ZT20-23 1372.7 1372.7 1372.7