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. 5565 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.
