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Fig. 3

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Confusion matrices for training, testing, and validation, and the three kinds of data combined for setting the MPG threshold to 12 +  log (O/H) = 8.0 using all 9 variables. The diagonal cells show the number of cases that were correctly classified, and the off-diagonal cells show the misclassified cases. The blue cell in the bottom right shows the total percent of correctly classified cases (in green) and the total percent of misclassified cases (in red).

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