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Household Transport in 2007

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Table 34: [Confidence limits] 95% confidence limits for estimates, based on SHS sub-samples sizes

Sub-sample size (n=100%)

Estimate

5%

10%

15%

20%

25%

30%

35%

40%

45%

50%

or

or

or

or

or

or

or

or

or

95%

90%

85%

80%

75%

70%

65%

60%

55%

percentage points ( + / - )

100

5.1

7.1

8.4

9.4

10.2

10.8

11.2

11.5

11.7

11.8

200

3.6

5.0

5.9

6.7

7.2

7.6

7.9

8.1

8.3

8.3

300

3.0

4.1

4.8

5.4

5.9

6.2

6.5

6.7

6.8

6.8

400

2.6

3.5

4.2

4.7

5.1

5.4

5.6

5.8

5.9

5.9

500

2.3

3.2

3.8

4.2

4.6

4.8

5.0

5.2

5.2

5.3

600

2.1

2.9

3.4

3.8

4.2

4.4

4.6

4.7

4.8

4.8

700

1.9

2.7

3.2

3.6

3.8

4.1

4.2

4.4

4.4

4.4

800

1.8

2.5

3.0

3.3

3.6

3.8

4.0

4.1

4.1

4.2

900

1.7

2.4

2.8

3.1

3.4

3.6

3.7

3.8

3.9

3.9

1,000

1.6

2.2

2.7

3.0

3.2

3.4

3.5

3.6

3.7

3.7

1,200

1.5

2.0

2.4

2.7

2.9

3.1

3.2

3.3

3.4

3.4

1,400

1.4

1.9

2.2

2.5

2.7

2.9

3.0

3.1

3.1

3.1

1,600

1.3

1.8

2.1

2.4

2.5

2.7

2.8

2.9

2.9

2.9

1,800

1.2

1.7

2.0

2.2

2.4

2.5

2.6

2.7

2.8

2.8

2,000

1.1

1.6

1.9

2.1

2.3

2.4

2.5

2.6

2.6

2.6

2,500

1.0

1.4

1.7

1.9

2.0

2.2

2.2

2.3

2.3

2.4

3,000

0.9

1.3

1.5

1.7

1.9

2.0

2.0

2.1

2.1

2.1

3,500

0.9

1.2

1.4

1.6

1.7

1.8

1.9

1.9

2.0

2.0

4,000

0.8

1.1

1.3

1.5

1.6

1.7

1.8

1.8

1.9

1.9

5,000

0.7

1.0

1.2

1.3

1.4

1.5

1.6

1.6

1.7

1.7

6,000

0.7

0.9

1.1

1.2

1.3

1.4

1.4

1.5

1.5

1.5

7,000

0.6

0.8

1.0

1.1

1.2

1.3

1.3

1.4

1.4

1.4

8,000

0.6

0.8

0.9

1.1

1.1

1.2

1.3

1.3

1.3

1.3

9,000

0.5

0.7

0.9

1.0

1.1

1.1

1.2

1.2

1.2

1.2

10,000

0.5

0.7

0.8

0.9

1.0

1.1

1.1

1.2

1.2

1.2

12,000

0.5

0.6

0.8

0.9

0.9

1.0

1.0

1.1

1.1

1.1

14,000

0.4

0.6

0.7

0.8

0.9

0.9

0.9

1.0

1.0

1.0

16,000

0.4

0.6

0.7

0.7

0.8

0.9

0.9

0.9

0.9

0.9

18,000

0.4

0.5

0.6

0.7

0.8

0.8

0.8

0.9

0.9

0.9

20,000

0.4

0.5

0.6

0.7

0.7

0.8

0.8

0.8

0.8

0.8

25,000

0.3

0.4

0.5

0.6

0.6

0.7

0.7

0.7

0.7

0.7

30,000

0.3

0.4

0.5

0.5

0.6

0.6

0.6

0.7

0.7

0.7

35,000

0.3

0.4

0.4

0.5

0.5

0.6

0.6

0.6

0.6

0.6

40,000

0.3

0.4

0.4

0.5

0.5

0.5

0.6

0.6

0.6

0.6

45,000

0.2

0.3

0.4

0.4

0.5

0.5

0.5

0.5

0.6

0.6

50,000

0.2

0.3

0.4

0.4

0.5

0.5

0.5

0.5

0.5

0.5

e.g. an estimate of 55% that is based on a sample of 800 has 95% confidence limits of 55% ± 4.1% points

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Page updated: Friday, October 10, 2008