Clustering Quiz

What is clustering in machine learning?

• A method of unsupervised learning

• A method of semi-supervised learning

• A method of supervised learning

• A method of reinforcement learning

In clustering, how are observations grouped into clusters?

• Based on their label values

• Based on their similarities in data values

• Based on their prediction values

• Based on their feature values

What kind of machine learning is clustering considered?

• Semi-supervised learning

• Reinforcement learning

• Unsupervised learning

• Supervised learning

In the example given, what are the features used for clustering flowers?

• Type and fragrance

• Number of leaves and number of petals

• Color and size

• Height and width

Which algorithm is commonly used for clustering?

• K-Means clustering

• Decision tree

• Linear regression

• Random forest

What are the steps involved in K-Means clustering?

• Data preprocessing, model training, prediction

• Centroid initialization, data point assignment, centroid movement

• Centroid calculation, feature selection, label assignment

• Vectorization, normalization, clustering

How are data points assigned to clusters in K-Means clustering?

• Based on their label values

• Based on their feature values

• Based on their prediction values

• Based on their distance to centroids

What is the goal of moving centroids in K-Means clustering?

• To maintain the same distance between clusters

• To create new clusters

• To decrease the distance between clusters

• To increase the distance between clusters

How is a clustering model evaluated?

• Based on how well the resulting clusters are separated

• Based on the precision and recall values

• Based on the accuracy of predicted labels

• Based on the F1 score

What does the silhouette metric summarize in clustering?

• The average distance to cluster center

• The maximum distance to cluster center

• The ratio of distance between points in the same cluster and points in different clusters

• The average distance to other center