condition mean min max ZT0-3 4464.0159285 3788.034039 5139.997818 ZT4-7 7074.238431 6605.067138 7543.409724 ZT8-11 4892.62767825 3594.500132 6190.7552245 ZT12-15 631.868762 291.69270464999994 972.04481935 ZT16-19 445.28039090000004 328.6815535 561.8792283 ZT20-23 595.074790625 445.41028030000007 744.7393009499999