71. Hierarchical agglomerative clustering is typically visualized as?
72. Commons unsupervised applications include
73. The multiple coefficient of determination is computed by
74. The most popularly used dimensionality reduction algorithm is Principal Component Analysis (PCA). Which of the following is/are true about PCA?
1. PCA is an unsupervised method
2. It searches for the directions that data have the largest variance
3. Maximum number of principal components <= number of features
4. All principal components are orthogonal to each other
1. PCA is an unsupervised method
2. It searches for the directions that data have the largest variance
3. Maximum number of principal components <= number of features
4. All principal components are orthogonal to each other
75. A term used to describe the case when the independent variables in a multiple regression model are correlated is
76. Bayes' theorem describes the probability of an event, based on prior knowledge of conditions that might be related to the event.
77. In the example of predicting number of babies based on stork's population ,Number of babies is
78. What are two steps of tree pruning work?
79. Can a model trained for item based similarity also choose from a given set of items?
80. Which of the following is true about "Ridge" or "Lasso" regression methods in case of feature selection?
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