condition mean min max ZT0-3 30.837896020000002 28.22907191 33.44672013 ZT4-7 30.9451973775 27.149589634999998 34.740805120000005 ZT8-11 62.9303471825 47.02301326 78.837681105 ZT12-15 36.31695232 19.028776335 53.605128305 ZT16-19 15.99133673 15.320045534999998 16.662627925000002 ZT20-23 13.977607545000001 13.772754070000001 14.18246102