condition mean min max ZT0-3 1696.778432 1696.778432 1696.778432 ZT4-7 1544.8093210000002 1544.8093210000002 1544.8093210000002 ZT8-11 1395.9378270000002 1395.9378270000002 1395.9378270000002 ZT12-15 1409.3992130000001 1409.3992130000001 1409.3992130000001 ZT16-19 1517.060141 1517.060141 1517.060141 ZT20-23 1924.5718150000002 1924.5718150000002 1924.5718150000002