Are you a student struggling with the Data Mining NPTEL Week 3 assignment? Look no further! In this article, we have compiled a set of hints and answers to help guide you through the assignment.

Make sure to give it a try on your own first, but use these hints as a helpful resource.

## NPTEL DATA MINING ASSIGNMENT ANSWERS 2023 -WEEK 3

**Q1. Internal nodes of a decision tree correspond to**:

**Answer: A. Attributes**

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**Q2. In a multiclass classification problem, Bayes classifier assigns an instance to the class corresponding to:**

**Answer: A. Highest aposteriori probability**

**Q3. Three identical bags contain blue and yellow balls. The first bag contains 3 blue and 2 yellow balls, the second bag has 4 blue and 5 yellow balls, and the third bag has 2 blue and 4 yellow balls. A bag is chosen randomly and a ball is chosen from it. If the ball that is drawn out is blue, what will be the probability that the second bag is chosen?**

**Answer: C. 10/31**

**Q4. What is the entropy of the dataset?**

**Answer: B. 0.94**

**Q5. Which attribute would information gain choose as the root of the tree?**

**Answer: A. Age**

**Q6. Whether a person will buy if (Age=35, Student-No, Income Low, Credit_rating = Fair)?**

**Answer: A. Yes**

**Q7. What class does the person(Age-42, Student-No, Income-Medium, Credit_rating = Excellent)?**

**Answer: B. No**

**Q8. What class does the person (Age 25, Student-No, Income-Medium, Credit_rating = Fair}?**

**Answer: B. No**

**Q9. Which attribute would information gain choose for Age=31-40?**

**Answer: C. Is a leaf node with value Yes.**

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**Disclaimer:** Please keep in mind that these answers are intended to serve as a reference for students. Our website does not guarantee the accuracy of the answers provided. We encourage all students to complete their assignments independently and use these answers as a supplement to their own understanding.

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