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Table 2 Relative MSE of Spearman’s correlation matrices for sepal length (SL), sepal width (SW), petal length (PL) and petal width (PW)

From: Rank correlation under categorical confounding

    SL SW PL
Species of interest MAMSE Matrix SW PL PW PL PW PW
Setosa Global 76 34 38 170 103 92 132
  Pairwise   25 38 174 77 68 104
Versicolor Global 170 139 120 250 175 169 272
  Pairwise   154 139 350 225 217 284
Virginica Global 181 208 207 159 140 149 79
  Pairwise   198 169 169 136 141 95
  1. The values listed are \(100\,MSE(\hat {\rho }_{i})/MSE(\hat {\rho }_{{\boldsymbol {\mu }}})\) and are based on 10,000 repetitions. Each species of iris is in turn the target group. The MAMSE weights are calculated based on a global or pairwise strategy. Relative MSE are reported for each pairwise correlation, as well as for the correlation matrix in the case of global weights