Questions with Complete Solutions - Hamro CSIT

What is centroid based clustering? Why is k-means clustering called a centroid based clustering algorithm? Cluster the following instances of given data with the help of K means algorithm (Take K = 2, use first and last data points as initial centroids):

Instance X Y

P1 2 3

P2 3 4

P3 6 8

P4 7 9

P5 8 10

P6 9 11

Not Answered Data Warehousing and Data Mining

What is a rule based classifier? How to extract the rules from the decision tree? What is overfitting? How to detect overfitting? Explain the way to solve the overfitting problem. Train ID3 classifier using the dataset given below. Then predict the class label for the new data sample [Weather=Sunny, Temperature=Hot, Humidity=Normal, Wind=Strong].

Weather Temperature Humidity Wind Play Tennis

Sunny Hot High Weak No

Sunny Hot High Strong No

Overcast Hot High Weak Yes

Rainy Mild High Weak Yes

Rainy Cool Normal Weak Yes

Rainy Cool Normal Strong No

Overcast Cool Normal Strong Yes

Sunny Mild High Weak No

Sunny Cool Normal Weak Yes

Rainy Mild Normal Weak Yes

Not Answered Data Warehousing and Data Mining

What is the Apriori principle? How is it used by the Apriori algorithm for frequent pattern mining? What are the limitations of Apriori approach? Use the APRIORI algorithm to generate strong association rules from the following transaction database. Use min_sup=40% and min_confidence=75%.

Transaction ID Items Purchased

T1 Bread, Milk, Eggs, Butter

T2 Bread, Milk, Cheese

T3 Milk, Eggs, Cheese, Yogurt

T4 Bread, Butter, Cheese

T5 Bread, Milk, Butter, Yogurt

Not Answered Data Warehousing and Data Mining

What is text mining? What do you mean by web mining? Define NLP.

Not Answered Data Warehousing and Data Mining

Define social network analysis. What is the motivation behind link mining?

Not Answered Data Warehousing and Data Mining

What is clustering? How is it different from supervised classification? What is the DBSCAN algorithm?

Not Answered Data Warehousing and Data Mining

What is a confusion matrix? Explain the importance of confusion matrix in measuring the performance of classification models.

Not Answered Data Warehousing and Data Mining

What is a frequent pattern? What is market basket analysis? Explain it with suitable examples.

Not Answered Data Warehousing and Data Mining

Define social network analysis. What is the motivation behind link mining?

Not Answered Data Warehousing and Data Mining

What is text mining? What do you mean by web mining? Define NLP.

Not Answered Data Warehousing and Data Mining

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