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

Page updated: Friday, October 10, 2008