Statistics Worksheets With Answers - Newbattle High School Page 43
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45Answers to Use of Simple Statistics
Exercise 1
1.
(a)
10
(b)
74
(c)
7·6
2.
(a)
5·9
(b)
7·1
(c)
£14·43
3.
(a)
5
(b)
£17
(c)
25·5kg
4.
(a)
4
(b)
5
(c)
251
5.
(a)
18
(b)
19·6
(c)
20·5
(d)
26
6.
(a)
19 cm
(b)
170 cm
(c)
172 cm
7.
(a)
12 m
(b)
10·2 m
(c)
10 m
(d)
10 m
8.
Range
Mean
Mode
Median
Best
(a)
145
36
20
20
Med/Mode
(b)
51
43
34
36
Mode
(c)
11
60
56
59
Mean / Median
9.
(a)
30 mins
(b)
Med = 21 mins Mode = 10 mins
(c) Med. Mean is put out by 110 mins. Mode...only 2 at 10 mins..not enough to justify
10. (a)
Jim - 15 less
(b)
i)
11
ii)
18
(c)
Before = 46·1 After = 37·2
(d)
At end...wider range and mean lower
(e)
Above both times.
11. (a)
R 8 M 75·5
(b)
R 4 M 74·5
(c)
i) Mary ii) Mary (d) Beth
12. (a)
List Marks in order
(b)
15
(c)
Mean = 20·9 Mode = 18 Median = 20·5
(d)
20 or 21
Mean & median close to each other and small range
13. (a)
50·7
(b)
52
(c)
No!
(d)
Mode
14. (a)
36
(b)
3
15.
24
16. 6
Exercise 2
1.
(a)
Complete table
(b)
3·6
(c)
6
(d)
i)
4
ii)
4
2.
(a)
B = 3·4 D = 3
(b)
B = 3 D = 3
(c)
B = 3 D = 5
(d)
i)
The Groupies
ii)
neither
iii)
The Magpies.
3.
(a)
8 years
(b)
4
(c)
5·3
(d)
5
4.
(a)
21
(b)
5 cm
(c)
i) 15·8 cm
ii) 17 cm
iii) 17 cm
(d)
Not great! too low.
5.
(a)
Check table
(b)
5
(c)
i)
20·5
ii)
20
iii)
19
(d)
Median
Maths: Mathematics 2 (Int 1) Statistics
43
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