condition mean min max ZT0-3 1331.9 1331.9 1331.9 ZT4-7 1375.6 1375.6 1375.6 ZT8-11 1300.3000000000002 1300.3000000000002 1300.3000000000002 ZT12-15 1281.15 1281.15 1281.15 ZT16-19 1353.55 1353.55 1353.55 ZT20-23 1312.4 1312.4 1312.4