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1.

K-means clustering is an example of which kind of machine learning?

Unsupervised machine learning.

Supervised machine learning.

Reinforcement learning.

2.

You're using the built-in kmeans() function in R to train a K-means clustering model that groups observations into three clusters. How should you create the object of class kmeans to specify that you want to obtain three clusters?

kclust <- kmeans(nstart = 3)

kclust <- kmeans(iter.max = 3)

kclust <- kmeans(centers = 3)

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