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Table 13 Confusion matrix of the kNN algorithm

From: Educational data mining: prediction of students' academic performance using machine learning algorithms

  Predicted
< 32.5 32.5–55 55–77.5 ≥ 77.5 Sum
Actual < 32.5 50.0% 2.6% 1.1% 0.5% 38
32.5–55 30.0% 31.3% 8.9% 1.5% 154
55–77.5 15.0% 55.7% 72.9% 24.9% 1016
≥ 77.5 5.0% 10.4% 17.1% 73.1% 646
Sum 40 115 1089 610 1854