DM week 9

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  • Created by: mariolarc
  • Created on: 14-05-21 10:55

1. The confidence of an association rule is:

  • (support count of the rule) / (support count of the antecedent)
  • (support count of the rule) / (number of transactions)
  • A table specifying the number of transactions containing either the right-hand side of the rule, or the left-hand side, or both, or none of the two.
  • (support count of the rule) / (support count of the consequent)
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Other questions in this quiz

2. Which of the following statements about survival curves is false?

  • Specifies a probability distribution.
  • Can be used for computing the hazard,
  • May increase and decrease over time.
  • Always start at 100%.

3. Which of the following terms is most relevant in the context of time series?

  • Censoring
  • Hazard
  • Segmentation
  • Header table

4. Which of the following statements about the Apriori algorithm is false?

  • The worst-case running of the algorithm is exponential with respect to the number of attributes.
  • Returns the association rules that can be produced by all frequent k-item sets.
  • Is an algorithm for computing association rules.
  • Produces (k+1)-item sets only from k-item sets.

5. Which of the following statements about the FP-Growth algorithm is false?

  • Is more efficient than the Apriori algorithm in terms of running time, in general.
  • Uses the FP-tree data structure for more effectively extracting association rules from a data set.
  • Each node of the FP tree is associated with an item and a value which corresponds to the frequency of the item in the data set.
  • Sorts the items of an instance in decreasing order of their frequency in the data set.

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