Succeed with maths – Part 2

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# 4.2 Representing data in tables clearly

Some tables contain very large numbers or very small numbers. To make these easier to read, the way they are presented may be changed. For example, suppose the number of tourists (rounded to the nearest thousand) visiting south-west Ireland in four quarterly periods were 556 000, 320 000, 284 000 and 355 000. These numbers can be expressed as 556 x 1000, 320 x 1000 and so on. Using units of 1000, the numbers in the table can be written simply as 556, 320, 284 and 355, and the column heading changed to ‘Numbers (000s)’ or ‘Numbers (thousands)’. The values then become much easier to read. This is very similar to scientific notation but presented in a different way!

Table 10 indicates the number of visitors to the different regions of Ireland in 2011 and the revenue generated.

## Table 10 Where did the tourists go and how much did they spend (2011)?

Numbers (000s)Revenue (€m)Overseas tourists Northern Ireland Domestic Total
Dublin

3805

1125.2

311

76.1

1683

314.6

5799

1515.9

Midlands/east

760

253.1

185

38.0

1183

198.5

2128

489.6

South-east

720

171.5

73

19.6

1293

271.3

2086

462.4

South-west

1678

595.9

70

19.6

1906

442.7

3654

1058.2

Shannon

859

256.8

32

8.1

887

169.1

1778

434.0

West

1180

423.6

103

27.7

1303

290.8

2586

742.1

North-west

505

144.7

530

80.7

739

135.2

1774

360.6

Total revenue2970.8 269.8 1822.25062.8
(Fáilte Ireland, 2012)
‘Euro m’ (or ‘€m’) is an abbreviation for ‘millions of euros’, the currency used in Ireland.

## Activity 7 Where did the tourists go?

Timing: Allow approximately 5 minutes

Use the table above to answer the following questions. Remember, ‘Euro m’ (or ‘€m’) is an abbreviation for ‘million of euros’. Don’t forget to click on reveal comment if you would like a hint.

(a) How many domestic tourists visited Shannon in 2011?

### Comment

Remember to take note of the units used for numbers of visitors.

(a) Take care with the figures when you read them from the table. The number of people is given in thousands, so the number of domestic tourists who visited Shannon in 2011 was 887 000. The number in the table is 887, but the units are in thousands of visitors, making the final answer 887 000.

(b) Roughly how much did all the tourists spend in Dublin in 2011?

(b) Tourists visiting Dublin spent €1515.9 million, or about €1.52 billion.

1515.9 million = 1 515 900 000

1 billion = 1 000 000 000

So 1515.9 million = 1.52 billion (to 2 d.p.)

(c) In which regions were there more domestic tourists than overseas tourists?

(c) Comparing the columns for the overseas tourists and the domestic tourists shows that there were more domestic tourists than overseas tourists in all the regions except Dublin.

So, now you’ve had some practice at taking information from a data, it is time to think about constructing your own tables.