Nptel Data Science for Engineers Assignment 8 Answers
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Nptel Data Science for Engineers Assignment 8 Answers
Nptel Data Science for Engineers Assignment 8 Answers (July-Dec 2024)
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): A) 8.316061, 11.952463, 16.212213, 19.922437 B) 7.453059, 12.158682, 13.212213, 21.158766 C) 8.316061, 13.952463, 15.212213, 19.922437 D) None of the above
Answer: A) 8.316061, 11.952463, 16.212213, 19.922437
According to the built model, the size of each cluster is __ (the order of values in each option could be different): A) 13, 13, 7, 14 B) 11, 18, 25, 24 C) 8, 13, 16, 13 D) None of the above
Answer: C) 8, 13, 16, 13
The Between Cluster Sum-of-Squares (BCSS) value of the built K-means model is __(Choose the appropriate range): A) 100 – 200 B) 200 – 300 C) 300 – 350 D) None of the above
Answer: A) 100 – 200
The Total Sum-of-Squares value of the built k-means model is __ (Choose the appropriate range): A) 100 – 200 B) 200 – 300 C) 300 – 350 D) None of the above
Answer: A) 100 – 200
Which of the statement is INCORRECT about KNN algorithm? A) KNN works ONLY for binary classification problems B) If k = 1, then the algorithm is simply called the nearest neighbour algorithm C) Number of neighbours (K) will influence classification output D) None of the above
Answer: A) KNN works ONLY for binary classification problems
These are Nptel Data Science for Engineers Assignment 8 Answers
K means clustering algorithm clusters the data points based on: A) Dependent and independent variables B) The eigen values C) Distance between the points and a cluster centre D) None of the above
Answer: C) Distance between the points and a cluster centre
The method / metric which is NOT useful to determine the optimal number of clusters in unsupervised clustering algorithms is: A) Scatter plot B) Elbow method C) Dendrogram D) None of the above
Answer: A) Scatter plot
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: A) Hierarchical clustering B) K-means clustering C) KNN D) None of the above
Answer: B) K-means clustering
These are Nptel Data Science for Engineers Assignment 8 Answers
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These are NPTEL Data Science for Engineers Assignment 8 Answers
Q1. 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
Answer: a) 8.316061 11.952463 16.212213 19.922437
Q2. 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
Answer: 8 13 16 13
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These are NPTEL Data Science for Engineers Assignment 8 Answers
Q3. The Between Cluster Sum-of-Squares (BCSS) value of the built K-means model is _______ (Choose the appropriate range) 100 – 200 200 – 300 300 – 350 None of the above
Answer: 100 – 200
Q4. The Total Sum-of-Squares value of the built k-means model is ________ (Choose the appropriate range) 100 – 200 200 – 300 300 – 350 None of the above
Answer: 100 – 200
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Q5. 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
Answer: KNN works ONLY for binary classification problems
Q6. 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
Answer: Distance between the points and a cluster centre
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These are NPTEL Data Science for Engineers Assignment 8 Answers
Q8. 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
Answer: Scatter plot
Q8. 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: K-means clustering
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These are NPTEL Data Science for Engineers Assignment 8 Answers
Consider the dataset “USArrests.csv”. Answer questions 1 to 4 based on the information given below:
This data set contains statistics, in arrests per 100,000 residents for assault, murder, and rape in each of the 50 US states in 1973. Also given is the percent of the population living in urban areas.
First level item Set the column “States” as index of the data frame while reading the data
First level itemSet the random number generator to set.seed(123)
First level item Normalize the data using scale function and build the K-means algorithm with the given conditions:
– Second level item number of clusters = 4 – Second level item nstart=20
Q1. 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
Answer: 8.316061 11.952463 16.212213 19.922437
Q2. 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
Answer: 8 13 16 13
Q3. The Between Cluster Sum-of-Squares (BCSS) value of the built K-means model is _ (Choose the appropriate range) 100 – 200 200 – 300 300 – 350 None of the above
Answer: 100 – 200
Q4. The Total Sum-of-Squares value of the built k-means model is _ (Choose the appropriate range) 100 – 200 200 – 300 300 – 350 None of the above
Answer: 100 – 200
Q5. 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
Answer: KNN works ONLY for binary classification problems
Q6. 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
Answer: Distance between the points and a cluster centre
Q7. 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
Answer: Scatter plot
These are NPTEL Data Science for Engineers Week 8 Answers
Q8. 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: K-means clustering
These are NPTEL Data Science for Engineers Assignment 8 Answers
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These are NPTEL Data Science for Engineers Assignment 8 Answers
Consider the dataset “USArrests.csv”. Answer questions 1 to 4 based on the information given below: This data set contains statistics, in arrests per 100,000 residents for assault, murder, and rape in each of the 50 US states in 1973. Also given is the percent of the population livingin urban areas.
• Set the column “States” as index of the data frame while reading the data • Set the random number generator to set.seed(123) • Normalize the data using scale function and build the K-means algorithm with the given conditions: – number of clusters = 4 – nstart=20
Q1. 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):- a. 8.316061 11.952463 16.212213 19.922437 b. 7.453059 12.158682 13.212213 21.158766 c. 8.316061 13.952463 15.212213 19.922437 d. None of the above
Answer: a. 8.316061 11.952463 16.212213 19.922437
Q2. According to the built model, the size of each cluster is (the order of values ___ in each option could be different):- a. 13 13 7 14 b. 11 18 25 24 c. 8 13 16 13 d. None of the above
Answer: c. 8 13 16 13
These are NPTEL Data Science for Engineers Week 8 Answers
Q3. The Between Cluster Sum-of-Squares (BCSS) value of the built K-means model is ___ (Choose the appropriate range) a. 100 – 200 b. 200 – 300 c. 300 – 350 d. None of the above
Answer: a. 100 – 200
Q4. The Total Sum-of-Squares value of the built k-means model is _____(Choose the appropriate range) a. 100 – 200 b. 200 – 300 c. 300 – 350 d. None of the above
Answer: a. 100 – 200
These are NPTEL Data Science for Engineers Week 8 Answers
Q5. Which of the statement is INCORRECT about KNN algorithm? a. KNN works ONLY for binary classification problems b. If k=1, then the algorithm is simply called the nearest neighbour algorithm c. Number of neighbours (K) will influence classification output d. None of the above
Answer: a. KNN works ONLY for binary classification problems
Q6. K means clustering algorithm clusters the data points based on:- a. dependent and independent variables b. the eigen values c. distance between the points and a cluster centre d. None of the above
Answer: c. distance between the points and a cluster centre
These are NPTEL Data Science for Engineers Week 8 Answers
Q7. The method / metric which is NOT useful to determine the optimal number of clusters in unsupervised clustering algorithms is a. Scatter plot b. Elbow method c. Dendrogram d. None of the above
Answer: a. Scatter plot
Q8. 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 a. Hierarchical clustering b. K-means clustering c. KNN d. None of the above
Answer: b. K-means clustering
These are NPTEL Data Science for Engineers Week 8 Answers
