IF-THEN Rules in Data Science Quiz
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Questions and Answers

What does the confidence of X → Y measure?

  • The percentage of transactions that contain X and Y
  • The percentage of transactions that contain X
  • The ratio of transactions containing X and Y to the number of transactions containing X (correct)
  • The ratio of transactions containing X to the number of transactions containing X and Y

    • In Example 1, if the number of transactions in the dataset is 10 and the number of transactions containing X and Y is 3, what is the support of X → Y?

  • 30%
  • 0.3
  • 10/3
  • 3/10 (correct)

    • What is the formula for calculating the support of X → Y?

  • $Support(X \rightarrow Y) = \frac{X \cup Y}{X}$
  • $Support(X \rightarrow Y) = \frac{X \cap Y}{X}$
  • $Support(X \rightarrow Y) = \frac{X \cap Y}{D}$
  • $Support(X \rightarrow Y) = \frac{X \cup Y}{D}$ (correct)

    • If the number of transactions containing X and Y is 4, and the number of transactions containing X is 6, what is the confidence of X → Y?

    <p>4/6</p> Signup and view all the answers

    What is the confidence of A → D in Example 1, if the number of transactions containing A and D is 2 and the number of transactions containing A is 5?

    <p>40%</p> Signup and view all the answers

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