Scottish House Condition Survey: Fuel Poverty Report - 2003/04

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Table 17: "95% confidence limits" for estimates which are based on SHCS 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% +/- 3.9%-points ( i.e. 51.1% to 58.9%)

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

Estimate

1% or 99%

2% or 98%

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%

50

3.1

4.4

6.9

9.5

11.3

12.6

13.7

14.5

15.1

15.5

15.7

15.8

100

2.2

3.1

4.9

6.7

8.0

8.9

9.7

10.2

10.7

10.9

11.1

11.2

150

1.8

2.6

4.0

5.5

6.5

7.3

7.9

8.4

8.7

8.9

9.1

9.1

200

1.6

2.2

3.4

4.7

5.6

6.3

6.8

7.2

7.5

7.7

7.9

7.9

250

1.4

2.0

3.1

4.2

5.0

5.7

6.1

6.5

6.7

6.9

7.0

7.1

300

1.3

1.8

2.8

3.9

4.6

5.2

5.6

5.9

6.2

6.3

6.4

6.5

350

1.2

1.7

2.6

3.6

4.3

4.8

5.2

5.5

5.7

5.9

5.9

6.0

400

1.1

1.6

2.4

3.4

4.0

4.5

4.8

5.1

5.3

5.5

5.6

5.6

450

1.0

1.5

2.3

3.2

3.8

4.2

4.6

4.8

5.0

5.2

5.2

5.3

500

1.0

1.4

2.2

3.0

3.6

4.0

4.3

4.6

4.8

4.9

5.0

5.0

600

0.9

1.3

2.0

2.7

3.3

3.6

3.9

4.2

4.4

4.5

4.5

4.6

700

0.8

1.2

1.8

2.5

3.0

3.4

3.7

3.9

4.0

4.1

4.2

4.2

800

0.8

1.1

1.7

2.4

2.8

3.2

3.4

3.6

3.8

3.9

3.9

3.9

900

0.7

1.0

1.6

2.2

2.7

3.0

3.2

3.4

3.6

3.6

3.7

3.7

1000

0.7

1.0

1.5

2.1

2.5

2.8

3.1

3.2

3.4

3.5

3.5

3.5

1100

0.7

0.9

1.5

2.0

2.4

2.7

2.9

3.1

3.2

3.3

3.4

3.4

1200

0.6

0.9

1.4

1.9

2.3

2.6

2.8

3.0

3.1

3.2

3.2

3.2

1300

0.6

0.9

1.4

1.9

2.2

2.5

2.7

2.8

3.0

3.0

3.1

3.1

1400

0.6

0.8

1.3

1.8

2.1

2.4

2.6

2.7

2.8

2.9

3.0

3.0

1500

0.6

0.8

1.3

1.7

2.1

2.3

2.5

2.6

2.8

2.8

2.9

2.9

1600

0.6

0.8

1.2

1.7

2.0

2.2

2.4

2.6

2.7

2.7

2.8

2.8

1700

0.5

0.8

1.2

1.6

1.9

2.2

2.3

2.5

2.6

2.7

2.7

2.7

1800

0.5

0.7

1.1

1.6

1.9

2.1

2.3

2.4

2.5

2.6

2.6

2.6

1900

0.5

0.7

1.1

1.5

1.8

2.1

2.2

2.3

2.4

2.5

2.6

2.6

2000

0.5

0.7

1.1

1.5

1.8

2.0

2.2

2.3

2.4

2.4

2.5

2.5

2100

0.5

0.7

1.1

1.5

1.7

2.0

2.1

2.2

2.3

2.4

2.4

2.4

2200

0.5

0.7

1.0

1.4

1.7

1.9

2.1

2.2

2.3

2.3

2.4

2.4

2300

0.5

0.7

1.0

1.4

1.7

1.9

2.0

2.1

2.2

2.3

2.3

2.3

2400

0.5

0.6

1.0

1.4

1.6

1.8

2.0

2.1

2.2

2.2

2.3

2.3

2500

0.4

0.6

1.0

1.3

1.6

1.8

1.9

2.0

2.1

2.2

2.2

2.2

2600

0.4

0.6

1.0

1.3

1.6

1.8

1.9

2.0

2.1

2.1

2.2

2.2

2700

0.4

0.6

0.9

1.3

1.5

1.7

1.9

2.0

2.1

2.1

2.1

2.2

2800

0.4

0.6

0.9

1.3

1.5

1.7

1.8

1.9

2.0

2.1

2.1

2.1

2900

0.4

0.6

0.9

1.2

1.5

1.7

1.8

1.9

2.0

2.0

2.1

2.1

3000

0.4

0.6

0.9

1.2

1.5

1.6

1.8

1.9

1.9

2.0

2.0

2.0

1. Assumes a design factor of 1.14, which is the average calculated for the 2003/04 survey.

Page updated: Thursday, November 23, 2006