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Machine Learning Techniques · End Term · May 2025 · FN

Machine Learning Techniques · End Term · May 2025 FN

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Question 153 MCQ · 3.0 marks

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PCA has reduced the dimensionality of the dataset because the combinations of features are de-correlated.
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PCA has not reduced the dimensionality of the dataset because all principal components are retained.
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PCA always reduces the dimensionality of the dataset regardless of the number of components retained.
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PCA can never be used for dimensionality reduction.

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Question 154 MCQ · 3.0 marks

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Question 155 MCQ · 4.0 marks

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Question 156 MCQ · 2.0 marks

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100
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1

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Question 157 MSQ · 3.0 marks

Which among the following is TRUE for k-NN algorithm? Select all that apply.
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1-nearest neighbour is sensitive to outliers.
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k-NN can only be applied to a classification problem.
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As k increases, the model is more likely to overfit.
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The bias increases with the increase in the value of k.
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The variance increases with the increase in the value of k.

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Question 158 MSQ · 3.0 marks

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30
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120
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50
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160

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Question 159 MSQ · 3.0 marks

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Question 160 MSQ · 2.0 marks

With respect to the Lloyd’s algorithm, choose the correct statements:
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The partition configurations cannot repeat themselves.
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After doing the reassignments (consider at least one point reassigned to the new cluster), we might get the same means for all clusters.
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Objective function after making the re-assignments strictly reduces.
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Objective function after making the re-assignments strictly increases.

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Question 161 NAT · 3.0 marks

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Question 162 NAT · 4.0 marks

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Question 163 NAT · 4.0 marks

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Question 164 MCQ · 4.0 marks

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Based on the above data, answer the given subquestions.
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Question 165 MCQ · 2.0 marks

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Based on the above data, answer the given subquestions.
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The coefficients shrinks towards zero.
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The coefficients increases in magnitude.
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The coefficients remain unchanged.

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Question 166 NAT · 3.0 marks

Source diagram or notation
Based on the above data, answer the given subquestions.
What is the probability that a 60-year-old patient with a cholesterol level of 200 mg/dL has the disease? Enter the answer correct to two decimal places.

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Question 167 NAT · 3.0 marks

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Based on the above data, answer the given subquestions.
How high should the cholesterol level be for the patient mentioned in the previous question to have a 50% chance of being diagnosed with the disease?

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Question 168 MCQ · 2.0 marks

Consider the datapoints (−2,−2) with label +1 and (2, 2) with label −1. A hard margin SVM is applied on this dataset. Answer the given subquestions:
Which of the following is the decision boundary for the given dataset?
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6406534706407.Source diagram or notation

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Question 169 NAT · 2.0 marks

Consider the datapoints (−2,−2) with label +1 and (2, 2) with label −1. A hard margin SVM is applied on this dataset. Answer the given subquestions:
Source diagram or notation

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