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add comment about ch. 4, #8 #48

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4 changes: 4 additions & 0 deletions ch4/8.md
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Expand Up @@ -10,3 +10,7 @@ For KNN with K=1, the training error rate is 0% because for any training
observation, its nearest neighbor will be the response itself. So, KNN has a
test error rate of 36%. I would choose logistic regression because of its lower
test error rate of 30%.

<!-- I'm not sure that this is correct. I believe that KNN where K = 1 looks at the single
closest neighbor, not the example itself. Please correct me if I am wrong! -->