Information Management – Assignment 3 – Answer Sheet Total:_______
Student Name :
Student ID :
Class code :
Question 1 (40 marks) Q1 total:
C
19
2020
20
(2 marks)
21
(3 marks)
22
(3 marks)
23
(3 marks)
24
(2 marks)
25
26
2020
27
(1 mark)
28
29
30
(1 mark)
31
(1 mark)
32
(1 mark)
33
34
(1 mark)
35
(1 mark)
36
(1 mark)
37
(1 mark)
38
(1 mark)
39
(1 mark)
40
(2 marks)
41
(1 mark)
42
43
(1 mark)
44
(2.5 marks)
45
(5 marks)
46
(2 marks)
47
48
2020
49
(0.5 mark)
50
(0.5 mark)
51
(0.5 mark)
52
(2 marks)
Question 2 (20 marks) Q2 total:
a. (2 marks)
e.g.
Support{X,Y}
=3/10
=0.3
1)
Support{P}
=
=
2)
Support{Q,S}
=
=
3)
Support{P,Q,S}
=
=
b. (2 marks)
e.g.
Confidence (X Y)
= Support{X,Y} / Support{X }
=0.3/0.7
=0.43
1)
Confidence (QS P)
=
=
=
2)
Confidence (P QS)
=
=
=
Is confidence a symmetric measure?
Ans: ____________________________________
c. (10 marks)
Please show your working steps in the table below.
Note: You may add or delete row(s) in the tables below if necessary.
Itemsets
Support
>= minimum support?
(Y or N)
e.g. {X}
=3/10 =0.3
N
Result:
Note: You may add or delete row(s) in the tables below if necessary.
Frequent itemsets
Support
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
d. (4 marks)
Note: You may add or delete row(s) in the tables below if necessary.
e.g.
Confidence (X Y)
= Support{X,Y} / Support{X }
=0.3/0.7
=0.43
1)
=
=
=
2)
=
=
=
3)
=
=
=
4)
=
=
=
5)
=
=
=
6)
=
=
=
7)
=
=
=
8)
=
=
=
9)
=
=
=
10)
=
=
=
11)
=
=
=
12)
=
=
=
e. (2 marks)
e.g.
Lift (X Y)
= Support{X,Y} / (Support{X} * Support{Y})
=0.3 / (0.7*0.5)
=0.86
1)
=
=
=
2)
=
=
=
3)
=
=
=
Question 3 (10 marks) Q3 total:
a. (2 marks)
b. (3 marks)
c. (5 marks)
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