Cambridge International Mathematics

0

0.5

1

1.5

2

2.5

0 20406080100

height ( cm)h

frequency density

ANSWERS 705

REVIEW SET 17A

1aThe variable can take any value in the continuous range

486 m< 53 grams.

b 506 m< 51 c ¼ 50 : 8 grams

dslightly negatively skewed

2a¼ 54 : 9 km/h b 556 v< 60 c ¼ 24 :3%

dsymmetrical

3a b 0 : 56 C< 1

4a b 206 h< 30

c ¼ 34 : 0 cm

5a

bi¼$ 950 ii ¼$ 1200

6aTime (tmin) Freq. Cum. Freq.

06 t<52 2

56 t< 10 3 5

106 t< 15 5 10

156 t<20 10 20

206 t<25 20 40

256 t<30 15 55

306 t< 35 5 60

356 t<40 10 70

406 t< 45 6 76

456 t< 50 4 80

bi 25 min

ii 15 min

iii 37 min

ci 27

ii 18

REVIEW SET 17B

1a 2 kg b 26 m< 4 c ¼ 4 : 76

de 377 of them

2a¼ 39 : 1 sec b 356 t< 40

3a

b 56 d< 5 : 5

4a Area (Am^2 ) Frequency

3006 A< 500 20

5006 A< 600 20

6006 A< 700 35

7006 A< 800 25

8006 A< 1100 45

b ¼ 712 m^2

5a Percentiles

UE point CF (boys) CF (girls) BG

10 5 0 3 : 10 : 0

20 3 4 8 : 13 : 3

30 25 12 15 : 610 : 0

40 35 22 21 : 918 : 3

50 75 37 46 : 930 : 8

60 125 62 78 : 151 : 7

70 145 102 90 : 685

80 155 112 96 : 993 : 3

90 160 117 100 : 097 : 5

100 160 120 100 :0 100: 0

bFor boys: medium¼ 52 , IQR¼ 19

For girls: medium¼ 59 , IQR¼ 22

cAs the girls graph is further to the right of the boys graph,

the girls are outperforming the boys. Both distributions are

negatively skewed.

0

10

20

30

40

012345

capacity ( litres)C

frequency density

0

50

100

150

200

250

300

400 800 1200 1600 2000

cumulative frequency

Cumulative frequency graph of wage data

wage ( )$

0

10

20

30

34567

d(m)

frequency density

0

20

40

60

80

100

0 102030405060708090100

scores (%)

percentiles

boys

girls

0

5

10

15

20

024681012

Histogram of masses of cats

m(kg)

frequency

Histogram of long jump data

Cumulative frequency graph of test scores

IB MYP_3 ANS

cyan magenta yellow black

(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_an\705IB_IGC1_an.CDR Thursday, 20 November 2008 4:17:48 PM PETER