condition mean min max ZT0-3 1347.9 1347.9 1347.9 ZT4-7 1234.6 1234.6 1234.6 ZT8-11 1276.35 1276.35 1276.35 ZT12-15 1141.85 1141.85 1141.85 ZT16-19 1213.0500000000002 1213.0500000000002 1213.0500000000002 ZT20-23 1312.45 1312.45 1312.45