condition mean min max ZT0-3 31.1880379375 23.33144462 39.044631255 ZT4-7 77.7680514825 77.24327603 78.292826935 ZT8-11 121.64054974250001 93.271581905 150.00951758000002 ZT12-15 134.587563385 100.46910802 168.70601875 ZT16-19 61.333801962500004 54.419239035000004 68.24836489 ZT20-23 30.49026846 26.367615245000003 34.612921674999996