1. a. 

b. 

2.a. 18 pupils travel to school on foot.
b. The most common method of transport is bus.
c. The least common method of transport is by car.
d. The difference is 12.
e. 60 pupils are represented in total.

3. a. 

b. 

4. a

Number of times 
watching TV
Tally
Frequency
0
1
1
1
11
2
2
11
2
3
111
3
4
1111
5
5
111
3
6
11
2
7
1
1
8
1
1

b.


c. The most common number of times was 4.

5. a. 24
b. There were 86 workers altogether (add each bar).
c. 55-65
d. 34
e. 28

6.

 
Height
Tally
Number of students
140 − 150
1111
4
150 − 160
1111
4
160 − 170
1111 1
6
170 − 180
1111
4
180 − 190
11
2

b. 
c. The most common height interval is 160 − 170

7.a. $10 million
b. The first quarter of 1999.
c. The third quarter of 1997.
d. Because the weather is cold.
e. Because it is hotter in summer.
f. Yes, shown by the upward trend of the graph.

8.

Year of Census
Population (millions)
1950
3.8
1960
4.1
1970
5.3
1980
6.6
1990
7,8
2000
8.9

a. 

b. There is obviously a steady and consistent increase in the population.