condition mean min max ZT0-3 1456.19218 1456.19218 1456.19218 ZT4-7 1440.124879 1440.124879 1440.124879 ZT8-11 1396.0901125 1396.0901125 1396.0901125 ZT12-15 1442.3001295 1442.3001295 1442.3001295 ZT16-19 1577.08498 1577.08498 1577.08498 ZT20-23 1314.0121 1314.0121 1314.0121