### Become an OU student

Diagrams, charts and graphs

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

# 2.2.1 Try some yourself

## Activity 7

Consider the table about household sizes.

• (a) What was the total number of households surveyed in 1971?

• (b) How many of the households surveyed in 1991 consisted of three people?

• (c) What is the total for the 1981 column?

• (a) The total number of households surveyed in 1971 was 18.6 million.

• (b) The table shows that 16% of the households surveyed in 1991 consisted of three people. The actual number of such households was 16% of 22.4 million, which is 3.584 million.

• (c) The total for the 1981 column is 22 + 32 + 17 + 18 + 7 + 4 = 100.

## Activity 8

Consider the table about families with dependent children.

• (a) What percentage of families have a single parent?

• (b) What percentage of families are couples with 2 or more dependent children?

• (a) The percentage of families with a lone mother is 19%

• The percentage of families with a lone father is 2%

• Hence the percentage of families with a singleparent is 19% + 2% = 21%

• (b) The percentage of families that are couples with 2 dependent children is 37% and

• The percentage of families that are couples with 3 or more dependent children is 25%.

• Hence the percentage of families that are couples with 2 or more dependent children is 37% + 25% = 62%.

## Activity 9

Below is a table summarising the cigarette-smoking habits of a sample of men in various age groups.

Number of cigarettesPercentage of each age group
smoked per day16–2425–3435–4950–5960 or overAll aged over 16
None625252506055
1–20181920212422
Over 20192928281623
Number of men surveyed1850256024701960215010 990
• (a) Write down the percentage of men aged between 25 and 34 who smoke over 20 cigarettes a day.

• (b) How many of the men aged 60 or over are non-smokers?

• (c) Which age group has the highest percentage of heavy smokers?