condition mean min max ZT0-3 1285.9 1285.9 1285.9 ZT4-7 1397.5 1397.5 1397.5 ZT8-11 1350.45 1350.45 1350.45 ZT12-15 1409.4 1409.4 1409.4 ZT16-19 1393.25 1393.25 1393.25 ZT20-23 1181.15 1181.15 1181.15