Page 69 - Pra U STPM 2022 Penggal 3 - Maths (T)

ANSWERS

1 Data Description 3. (a) 6.3 hours, [6.0 – 6.4] hours
(b) 0.63 g, [0.60 – 0.64] g
Exercise 1.1
1. (a) discrete (b) continuous 4. (a) Girls Boys
(c) continuous (d) discrete 0 9
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XX (e) discrete 0 11
1 13
2. (a) Stem Leaf 1 1 1 1 0 0 15 1 1
4 4 1 1 17 0 0 1 1
5 1 0 0 19 0 0 0
6 0 0 6 6 1 1 0 21 0 1 1 1 1 1 1 1
7 2 3 5 9 9 0 0 0 23 1
8 1 1 3 4 5 6 6 7 7 25 0 0
9 1 3 Key: 1|15 Key: 21|1
10 5 means 16 means 22
Key: 7|2 means 7.2 mm Comment: Boys hold their breath longer than girls.

(b) Stem Leaf (b) Chemistry Mathematics
45 2 4 1 3 2
50 2 2 4 6 6 5 4 3 4 2 4 5
55 3 4 4 9 8 7 3 3 0 5 2 7 9
60 0 2 2 3 3 8 7 2 1 6 2 4 5 6 7
65 0 0 1 2 3 4 4 7 4 7 1 3 3 7 8 9
70 0 1 2 4 4 2 8 4 6
75 1
80 1 Key: 6|4 Key: 5|2
means 46 means 52
Key: 50|2 means 52 kg
Comment: Students achieved higher marks in
(c) Stem Leaf Mathematics compared to Chemistry.
1 2 2 2 2 Exercise 1.2
1 5 5 5 5 5 5 1. (a) f
1 6 24
1 8 8 8 8 9 9 9 9
2 0 0 1 1 1 1
2 2 2 2 20
2 4 4
16
Key: 1|9 means 0.19 second
12
(d) Stem Leaf
0 2 3 8
0 8
1 2 4
1
2 1 4 0 x
8 8 9 5 6 7 8 9 10
3 0 1 2 (b) f
3 5 6 7 8 8 9 40
4 2 2
4 8 9 30
5 2
5 6 6 8 20
6 2
6 5 10
Key: 4|8 means 4.8 0 x
4.5 9.5 14.5 19.5 24.5 29.5 34.5 39.5

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Ans STPM Maths(T) T3.indd 285 28/10/2021 10:25 AM