condition mean min max ZT0-3 1.19689100975 1.1280360425 1.2657459770000001 ZT4-7 1.01191329775 0.9686705440000001 1.0551560515 ZT8-11 1.0161809635 0.988446187 1.04391574 ZT12-15 0.989527187 0.6987200085 1.2803343655 ZT16-19 1.8777914985000002 1.7357129839999998 2.0198700130000002 ZT20-23 2.64075550925 2.5724419235 2.7090690950000003