# NPTEL Data Science For Engineers Week 8 Assignment Answers 2023

NPTEL Data Science For Engineers Week 8 Assignment Solutions

## NPTEL Data Science For Engineers Week 8 Assignment Answers 2023

1. According to the built model, the within cluster sum of squares for each cluster is ________ (the order of values in each option could be different):-

8.316061 11.952463 16.212213 19.922437
7.453059 12.158682 13.212213 21.158766
8.316061 13.952463 15.212213 19.922437
None of the above

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2. According to the built model, the size of each cluster is _ (the order of values in each option could be different):-

• 13 13 7 14
• 11 18 25 24
• 8 13 16 13
• None of the above
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3. The Between Cluster Sum-of-Squares (BCSS) value of the built K-means model is ______ (Choose the appropriate range)

• 100 – 200
• 200 – 300
• 300 ā 350
• None of the above
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4. The Total Sum-of-Squares value of the built k-means model is _ (Choose the appropriate range)

• 100 – 200
• 200 – 300
• 300 ā 350
• None of the above
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5. Which of the statement is INCORRECT about KNN algorithm?

• KNN works ONLY for binary classification problems
• If k=1, then the algorithm is simply called the nearest neighbour algorithm
• Number of neighbours (K) will influence classification output
• None of the above
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6. K means clustering algorithm clusters the data points based on:-

• Dependent and independent variables
• The eigen values
• Distance between the points and a cluster centre
• None of the above
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7. The method / metric which is NOT useful to determine the optimal number of clusters in unsupervised clustering algorithms is

• Scatter plot
• Elbow method
• Dendrogram
• None of the above
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8. The unsupervised learning algorithm which aims to partition n observations into k clusters in which each observation belongs to the cluster with the nearest centroid is

• Hierarchical clustering
• K-means clustering
• KNN
• None of the above
`Answer :- For Answer Click Here`