1. What rule(s) classify a person who runs marathons? a. (GENDER = Male AND NBR_

Question

1. What rule(s) classify a person who runs marathons?

a. (GENDER = Male AND NBR_OF_CHILDREN = 0 AND AGE < 30) OR (GENDER = Female AND AGE < 25)

b. (GENDER = Male OR NBR_OF_CHILDREN = 0 OR AGE < 30) AND (GENDER = Female OR AGE < 25)

c. GENDER = Male AND NBR_OF_CHILDREN = 0

d. All of the above

1.2. What is the support for node 9?

a. 140

b. 160

c. 300

d. 1200

1.3 What is the confidence for node 9?

a. .07

b. .08

c. .47

d. .53

0: 1500 1: 500 GENDER Male GENDER Female 0: 250 1:950 0: 225 1: 75 NBR OF CHILDREN 0 NBR OF CHILDREN >0 AGE= 25 0: 100 1: 500 0:530 1: 70 0: 15 1:95 0: 110 1: 80 AGE

Explanation / Answer

1.

Option a correct.

(GENDER = Male AND NBR_OF_CHILDREN = 0 AND AGE < 30) OR (GENDER = Female AND AGE < 25)

It indicates two cases.

Case1: All must be satified given below

Case2: All must be satified given below

Any of two cases must be true

1.2

Option a correct.

140 is support for node 9.

Since it support both

0:140

1:160

1.3

Option c correct.

confidence for node 9 = support / total value

support = 140

total = 140+160 = 300

confidence for node 9 = 140 / 300

= 0.466666666666

= 0.47

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