Are you a student struggling with the Data Mining NPTEL Week 2 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.
WEEK 2 NPTEL DATA MINING ASSIGNMENT ANSWERS
Q1. If a store has N items, the number of possible itemsets is
a. 2N-1
b. 2N-1
c. N/2
d. N-1
Answer: b. 2N-1
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Q2. An association rule is valid if it satisfies
a. Support criteria
b. Confidence criteria
c. Both support and confidence criteria
d. None of these
Answer: c. Both support and confidence criteria
Q3. An itemset is frequent if it satisfies the
a. Support criteria
b. Confidence criteria
c. Both support and confidence criteria
d. None of these
Answer: a. Support criteria
Q4. Which of the following property is used by the apriori algorithm
a. Positive definiteness property of support
b. Positive semidefiniteness property of support
c. Monotone property of support
d. Antimonotone property of support
Answer: d. Antimonotone property of support
Q5. Consider three itemsets I1={bat, ball, wicket}, I2={bat, ball}, I3={bat}. Which of the following statements are correct?
a. support(I1) > support(I2)
b. support(I2) > support(I3)
c. both statements A and B
d. none of the statements A and B
Answer: d. none of the statements A and B
For questions 6-10, consider the following small database of four transactions. The minimum support is 60% and the minimum confidence is 80%.
| Trans_id | Itemlist |
| T1 | {F, A, D, B} |
| T2 | {D, A, C, E, B} |
| T3 | {C, A, B, E} |
| T4 | {B, A, D} |
Q6. The 1-itemsets that satisfy the support criteria are
a. {A}, {B}, {C}, {D}
b. {A}. {B}, {C}
c. {A}, {B}
d. None of these
Answer: c. {A}, {B}
Q7. The 2-itemsets that satisfy the support criteria are
a. {BC}, {BE}, {CE}, {AE}
b. {AB}. {BD}, {AD}
c. {AE}, {BC}
d. {BC}
Answer: b. {AB}. {BD}, {AD}
Q8. The 3-itemsets that satisfy the support criteria are
a. {ABC}, {ABE}, {BCD}, {ACD}
b. {ABE}. {BCD}, {ACD}
c. {ABE}, {BCD}
d. {ABD}
Answer: d. {ABD}
Q9. Which of the following is NOT a valid association rule?
a. A -> B
b. B -> A
c. A -> D
d. D -> A
Answer: c. A -> D
Q10. Which of the following is NOT a valid association rule?
a. A -> DB
b. D -> AB
c. AD -> B
d. DB -> A
Answer: a. A -> DB
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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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