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(c)
8 9 Statistics Points scored by 24 players

Statistics

1 (a) (i) 1 [1]
(ii) 1 [1]
0 × 10 + 1 × 20 + 2 × 12 + 3 × 5 + 4 × 3 60 61 70 76 80 86 90 95 100104 110
(iii) Points
50 [4]
= 1.42 [2] 5 (a) (i) 90 [1]
3k + 71
(b) = 2 (ii) 60 [1]
k + 50 (b) (i) 40 [1]
3k + 71 = 2k + 100 (ii) 30 [1]
k = 29 [2] (c) Class 2 [1]
8
(c) × 100% = 16% [1] (d) Class 1, their median is higher and the
50 interquartile range is also higher. [2]
2 (a) Number of words Frequency 6 x + 14 + 16 + 16 = 14 × 4
0 – 4 4 10, 14, 16, 16 x = 10 [3]
5 – 9 5 7 (a) 0 ≤ k ≤ 16 [1]
10 – 14 8 (b) 12 [1]
15 – 19 2 (c) 10 [1]
0 × 8 + 1 × 11 + 2k + 3 × 2 + 4 × 0 + 5 × 1
20 – 24 3 (d) 8 + 11 + k + 2 + 0 + 1
25 – 29 3 = 1.8
[3] 22 + 2k =1.8
9 22 + k
(b) × 100% = 36% [1]
25 k = 88 [2]
8
2
(a) 150 × 0.26 = 39
[1]
Penerbitan Pelangi Sdn Bhd. All Rights Reserved. [1]
(c)
× 100% = 8%
25 (b) 6 + 18 + 34 + 26 × 150 = 126 [2]
(d) (i) 14 [1] 100
(ii) 13 [1] (c) Grade A* = 0.06 × 360° = 21.6°
(e) 0 0 1 2 3 5 7 8 8 9 Grade A = 0.18 × 360° = 64.8°
1 0 1 2 3 3 4 4 4 5 9 Grade B = 0.34 × 360° = 122.4°
Grade C = 0.26 × 360° = 93.6°
2 0 0 1 5 6 7 150 – 126
Fail = × 360° = 57.6° [5]
Key: 1 | 2 means 12 words [4] 150
3 (a) (i) 2 [1] 9 (a) (i) 78 km/h [1]
(ii) 2 [1] (ii) 83 – 71 = 12 [2]
(b) 100 km/h
(iii) 2 [1] 10 (a) [2]
(iv) 3 × 8 + 2 × 15 + 1 × 7 = 2.03 [2] Frequency
8 + 15 + 7
8 density
(b) × 360° = 96° [2]
30 5 4.8
(c) Mean 4.5
175 × 7 + 182.5 × 13 + 187.5 × 6 + 192.5 × 2
= 4
28
= 182.41 cm [4]
4 (a) (i) 43 [1] 3
(ii) 86 [1] 2.2
(iii) 86 [1] 2
(iv) Mean = 2045 = 85.208 [2] 1.4
24
5 1 0.8
(b) × 100% = 20.8% [2]
24
Age (a)
0 20 30 40 50 60
[6]

Answers 181

Answers.indd 181 15/03/2022 11:08 AM