Page 459 - Math Smart - 7

Check My Understanding (Pg 394) e) Mathematics f)1
1. a)20 b) 10-19 Strawberries c)15.5 2. a) $3200 b) Sizzling Steaks
2. a) 11 c) DIY Homefix and FF Fashion
3. a) 123 b) Between 0 and 10 c) 29.07 min d) $900 e) Babyland f) Value Shop
4. a) Between 500 and 1000 b) 86 c)1011.63 g) Value Shop as it seems to be the most popular
company
Check My Understanding (Pg 398)
1. a) For A, Mean is 147.4, Median is 144, Mode Is none Check My Understanding (Pg 406)
and Range is 55. For B, Mean is 161, Median is 161, 3) Number of whales sighted
Mode is none and Range is 43 20 H
b) Median as the range is too iarge, which means there
10-
are outliers
c) Both Mean and Median is ok as they are both the 0-J 1
same 0-10 11-20 21-30 31-40 41-50
d) Median S Number of whales sighted

Recall (Pg 399) b) 13 c) 20 d) 25.93% 0)615
Schools Number of Buses
Check My Understanding (Pg 410)
RE School SBWW 1. a) Body Part
Artistic School mm n Muscle
Music Academy nnoQW 20 n Fat
n Bone
School of Academics mmm
Other
Awesome School
Total: 80
b)i)| ii) 17.5%
Each W represents 2 buses
2. a) Water Usage in Litres
Check My Understanding (Pg 401)
900 n Shower
1. a)
400. n Toilet
Day Number of Cars Sold
, 3000 n Leaks
Monday Washing
Tuesday n Cooking
Wednesday 1620 n Other
Total: 7240
Thursday
b) Shower c) 4.42% d) Fix their leaks
Friday
3. a) 36 b) 15 c) 20% d) 30
Saturday m. / i\ / 'n f i\. e) 5 less youths indicated Yellow Dragons than Super
/ 1
Spurs
Each W represents 5 cars sold f) 10% g) Super Spurs
bi)185 ii) Saturday iii) Monday iv) 15
2. a) 60 b)70 c)12 d)10 e) 15 Revision (Pg 412)
f) Both 13 and 14 g)18 h) 25 1. 19
2. a) 40 b) No Mode c) 36.7 (1 d.p.)
i) Draw half a boy symbol under the number of youths
d)32 e)35 f) 40.8 (1 d.p.)
for age 14
3. Answers may vary. 23, 24, 25, 26, 27
Check My Understanding (Pg 405) 4. Answers may vary. 10, 10, 20, 0
5. a)
1. a)
Number of Teachers Score Frequency
10- 20 < X < 40 II
8-
40 < X < 60 III
6-
4-1 1 60 < X < 80 IIH III!
TtttTttT
2- m
0 80<x< 100
& s
*^2 := O O S b) 25% c) 10% d) 60 < X < 80
mo

2 ^ V c «-
ca 6. a)
Score Frequency
m Number of Teachers 80 < X < 90 1
90 <x < 100 1
b) 35 c) 3 d) Accountancy 100<x < 110 1