add link to Practical Machine Learning

justmarkham · justmarkham · commit b2bf4972615e · 2014-08-15T00:04:29.000-04:00
diff --git a/pml.md b/pml.md
@@ -4,3 +4,6 @@ title: Practical Machine Learning
 permalink: /pml/
 ---
 
+## Model Evaluation
+
+- [Simple Guide to Confusion Matrix Terminology (sensitivity, specificity, etc.)](http://www.dataschool.io/simple-guide-to-confusion-matrix-terminology/)
