摘要: Abstract Ordinally invariant, i.e., rank, measures of association for bivariate populations are discussed, with emphasis on the probabilistic and operational interpretations their population values. The three considered at length quadrant measure, Kendall's tau, Spearman's rho. Relationships between these as connections certain cross classifications. Sampling theory is surveyed special attention to motivation sample values measures. historical development ordinal outlined. * This research was supported in part by Statistics Branch, Office Naval Research. Reproduction whole or permitted any purpose United States Government. A large work leading this paper done Department Statistics, University California, Berkeley. I would like thank following persons suggestions c...