Problem 1. The following table summarizes a data set with three attributes A, B,

Question

Problem 1. The following table summarizes a data set with three attributes A, B, C and two class labels +, having the values for A, B, and C in that row. For a given entry, "Number of Instances" represents that number of data observations AB C Number of Instances TTT5 F T T020 TFT 20 0 FF TO FT F250 FF F025 (a) Find the support and confidence for the rule if C = F then class =-. (b) Find the support and confidence for the rule if A = F and C = T then class =- (c) Using the 1-rule method discussed in class, find the relevant sets of classification rules for the target variable by testing each of the input attributes A, B, and C. Which of these three sets of rules has the lowest misclassification rate?

Explanation / Answer

(a) If C =F then Class = 25-25

= 0

(b) If A = F and C = T then Class = -20-5

= -25

(c) A =F ,B =F and C= T is the lowest misclassification rate = -5

(c)

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