condition mean min max ZT0-3 36.5467 15.173449999999999 78.96865 ZT4-7 103.07849999999999 103.07849999999999 103.07849999999999 ZT8-11 59.29235 59.29235 59.29235 ZT12-15 19.72195 6.9454 32.4985 ZT16-19 1.7074250000000002 1.7074250000000002 1.7074250000000002 ZT20-23 1.534395 1.534395 1.534395