condition mean min max ZT0-3 1307.85 1307.85 1307.85 ZT4-7 1502.6 1502.6 1502.6 ZT8-11 1375.85 1375.85 1375.85 ZT12-15 1533.6 1533.6 1533.6 ZT16-19 1332.9 1332.9 1332.9 ZT20-23 1174.8 1174.8 1174.8