condition mean min max ZT0-3 1383.0 1383.0 1383.0 ZT4-7 1499.4 1499.4 1499.4 ZT8-11 1375.3 1375.3 1375.3 ZT12-15 1226.35 1226.35 1226.35 ZT16-19 1446.6 1446.6 1446.6 ZT20-23 1595.0 1595.0 1595.0