@ Safari File Edit View History Bookmarks Window Help @ olympus.mygreatlearning.com @ Great Learning X Hierarchical Clustering and PCA: Graded Quiz = Question 1/10 2 Marks Answer Choices Select the rig h Which of the following statement is/are true about the difference between PCA and Hierarchical O 1 and 2 Clustering? 1. Cluster analysis groups observations while PCA is used for dimensionality reduction. @) 3 and 4 2. PCA groups observations while cluster analysis is used for dimensionality reduction. 3. PCA can be used to reduce the number of variables in the data whereas cluster analysis cannot. O iota s ; : : a 4. Clustering analysis can be used to reduce the number of variables in the data whereas PCA cannot. 2and4