Answers to all pages - Hodder Plus Home
Answers to all pages - Hodder Plus Home
Answers to all pages - Hodder Plus Home
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Model answers<br />
3<br />
Gate<br />
Toilets<br />
The pavilion<br />
can be built<br />
on this section<br />
of the line.<br />
Gate<br />
Scale 1 cm <strong>to</strong> 50 m<br />
Processing and representing data (<strong>pages</strong> 96–97)<br />
1 (a) (i)<br />
Weight (w kg) w 5 w 10 w 15 w 20 w 25 w 30 w 35<br />
Cumulative frequency 9 22 43 60 70 78 80<br />
(ii)<br />
80<br />
Cummulative frequency<br />
60<br />
40<br />
20<br />
Upper quartile<br />
Median<br />
Lower quartile<br />
0<br />
(c)<br />
5 10<br />
15 20 25 30<br />
35<br />
Weight (kg)<br />
2<br />
(b) (i) 14 <strong>to</strong> 14·8 kg (ii) 20 – 9 = 11 (10·5 <strong>to</strong> 11 is acceptable)<br />
(c) Reading off from 8 gives 17. 80 – 17 = 63 (63 <strong>to</strong> 65 is acceptable)<br />
Weight (w grams) Number of apples Mid-interval value w × f<br />
50 w 60 23 55 1265<br />
60 w 70 42 65 2730<br />
70 w 80 50 75 3750<br />
80 w 90 20 85 1700<br />
90 w 100 15 95 1425<br />
Total 150 10 870<br />
Mean = 10 870 ÷ 150 = 72·5 kg <strong>to</strong> 3 s.f.<br />
IGCSE Revision Guide for Mathematics Model <strong>Answers</strong> © 2004, <strong>Hodder</strong> & S<strong>to</strong>ugh<strong>to</strong>n Educational<br />
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