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Household Transport in 2006: Some Scottish Household Survey Results

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Table 28 "95% confidence limits" for estimates which are based on SHS sub-samples of various sizes

e.g. an estimate of 55% which is based on a sample of 800
(I.e. the n corresponding to "100%" is 800)
has 95% confidence limits of 55% +/- 4.1%-points ( i.e. 50.9% to 59.1%)

Sub-sample size.
(i.e the "n=" value corresponding to 100%)

Estimate

5% or 95%

10% or 90%

15% or 85%

20% or 80%

25% or 75%

30% or 70%

35% or 65%

40% or 60%

45% or 55%

50%

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

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Page updated: Monday, October 8, 2007