condition mean min max ZT0-3 49.5463790795 11.058302749 88.03445541 ZT4-7 5.609360698750001 3.3197601665 7.898961231 ZT8-11 11.3160186525 9.290296375 13.34174093 ZT12-15 8.936008218 6.548771178 11.323245258 ZT16-19 6.1130157595 5.605473647 6.620557872 ZT20-23 8.78634686125 7.824236516 9.7484572065