condition mean min max ZT0-3 415.0 415.0 415.0 ZT4-7 2511.3 2511.3 2511.3 ZT8-11 2374.25 2374.25 2374.25 ZT12-15 1478.7 1478.7 1478.7 ZT16-19 840.8000000000001 840.8000000000001 840.8000000000001 ZT20-23 533.85 533.85 533.85