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Clustering – The Data Ensemble Q&A

What is a preferred distance measure while dealing with sets ?
Jaccard — Correct

Each point is a cluster in itself. We then combine the two nearest clusters into one. What type of clustering does this represent ?
Agglomerative — Correct

Which learning is the method of finding structure in the data without labels.
Unsupervised — Correct

__ of a set of points is defined using a distance measure .
Similarity — Correct

Members of the same cluster are far away / distant from each other .
False — Correct

Unsupervised learning focuses on understanding the data and its underlying pattern.
True — Correct


_ of two points is the average of the two points in Eucledian Space.
Centroid — Correct

A centroid is a valid point in a non-Eucledian space .
False — Correct

What is the overall complexity of the the Agglomerative Hierarchical Clustering ?
O(N^3) — Correct

_ measures the goodness of a cluster
Cohesion — Correct

_ is the data point that is closest to the other point in the cluster.
Clusteroid — Correct

The __ is a visual representation of how the data points are merged to form clusters.
Dendogram — Correct


_ is when points don’t move between clusters and centroids stabilize.
Convergence — Correct

_ is a way of finding the k value for k means clustering.
Cross Validation — Correct

The number of rounds for convergence in k means clustering can be lage
True — Correct

Sampling is one technique to pick the initial k points in K Means Clustering
True — Correct

K Means algorithm assumes Eucledian Space/Distance
True — Correct


What is the R Function to divide a dataset into k clusters ?
kclusters() — Wrong

What is the R function to apply hierarchical clustering to a matrix of distance objects ?
hclust() — Correct

2 Comments

  1. SamratSamrat
    Samrat

    Hierarchical Clustering is a suggested approach for Large Data Sets – False

    9 February 2021 at 10:22 pm Reply
  2. ArunrajArunraj
    Arunraj

    What is the R Function to divide a dataset into k clusters ?
    KMeans is the correct answer

    28 March 2021 at 1:27 pm Reply

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