condition mean min max ZT0-3 0.7559403335 0.6923881270000001 0.8194925399999999 ZT4-7 0.91739073075 0.835813106 0.9989683555 ZT8-11 0.5285795280000001 0.41798548950000003 0.6391735665 ZT12-15 0.49783055125 0.29949754 0.6961635625 ZT16-19 0.9169629375 0.623049972 1.210875903 ZT20-23 2.02969421 1.87483705 2.1845513700000003