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Exhibit 9-2. The scatter chart below displays 6 observations of a training set p

ID: 3218760 • Letter: E

Question

Exhibit 9-2. The scatter chart below displays 6 observations of a training set plotted according to the values of 2 quantitative variables (x1 and x2 expressed in the same units) that characterize the 6 observations. (The normalization of these values is not needed.). Three observations (#1,#2,#3) belong to Class 1, and the other three (#4, #5, #6) to Class 0. The chart also displays a new observation (#7) that must be classified using the k-NN method with the cutoff value of 0.5.

Question 12

Refer to Exhibit 9-2. For k = 1, Observation 7 should be classified in

neither Class 1nor Class 0

Class 0

Class 1

both Class 1 and Class 0

Question 13

Refer to Exhibit 9-2. For k = 2, Observation 7 should be classified in

Class 0

neither Class 1nor Class 0

Class 1

both Class 1 and Class 0

Refer to Exhibit 9-2. For k = 3, Observation 7 should be classified in

both Class 1 and Class 0

Class 1

Class 0

neither Class 1nor Class 0

A.

neither Class 1nor Class 0

B.

Class 0

C.

Class 1

D.

both Class 1 and Class 0

3.5 2.5 1.5 0.5 1.5 2.5 3.5 4.5 X1

Explanation / Answer

1)

Answer: C

That is, class 1.

2)

Answer: C

That is, class 1.

3)

Answer: B

That is, class 1.

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