condition mean min max ZT0-3 1139.2 1139.2 1139.2 ZT4-7 1467.7 1467.7 1467.7 ZT8-11 1558.45 1558.45 1558.45 ZT12-15 1492.2 1492.2 1492.2 ZT16-19 1272.15 1272.15 1272.15 ZT20-23 1058.0 1058.0 1058.0