MACHINE LEARNING

APPLICATION OF SUPERVISED LEARNING

UNSUPERVISED LEARNING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
True or False:If the responsibility, rnk is high, it means that data point n is a plausible sample from the kth mixture
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -The first visible difference between K-Means and Gaussian Mixtures is the shape the decision boundaries. GMs are somewhat more flexible and with a covariance matrix ∑ we can make the boundaries elliptical, as opposed to circular boundaries with K-means. Another thing is that GMs is a probabilistic algorithm.

Detailed explanation-2: -Of the clustering algorithms covered in class, Gaussian Mixture Models used for clustering always outperforms k-means and single link clustering. F. Even in practice, the structure in underlying data dictates which algorithm is better for your problem.

Detailed explanation-3: -k-means only considers the mean to update the centroid while GMM takes into account the mean as well as the variance of the data!

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