Information for pairs0012: Census Income (KDD) dataset https://archive.ics.uci.edu/ml/datasets/Census-Income+(KDD) Info from the UCI ML webpage: "This data set contains weighted census data extracted from the 1994 and 1995 current population surveys conducted by the U.S. Census Bureau. Original Owner: U.S. Census Bureau http://www.census.gov/ United States Department of Commerce Donor: Terran Lane and Ronny Kohavi Data Mining and Visualization Silicon Graphics. terran '@' ecn.purdue.edu, ronnyk '@' sgi.com The instance weight indicates the number of people in the population that each record represents due to stratified sampling. To do real analysis and derive conclusions, this field must be used. This attribute should *not* be used in the classifiers." We did not use the instance weight here. x: Age y: Wage per hour ground truth: x-->y