1998 1999 - Nationalarchives.gov.uk

Table A2 Effect of counting rule and offence coverage changes, by police force area
England and Wales Percentage effect and 95% confidence intervals.
Police force area
Effect of new counting rules
and offence coverage by
police force area
23
Percentage point accuracy
(95% confidence level)
Avon and Somerset + 13.7% Nil
Bedfordshire + 11.7% Nil
Cambridgeshire + 12.7% +/- 1.9%
Cheshire + 9.6% Nil
Cleveland + 5.2% Nil
Cumbria + 14.3% +/- 1.1%
Derbyshire + 14.1% +/- 0.8%
Devon and Cornwall + 25.0% +/- 2.3%
Dorset + 20.2% Nil
Durham + 14.1% +/- 2.1%
Essex + 9.9% Nil
Gloucestershire + 9.6% +/- 2.3%
Greater Manchester + 7.8% Nil
Hampshire + 11.5% Nil
Hertfordshire + 6.6% +/- 1.3%
Humberside + 9.6% Nil
Kent + 17.3% +/- 1.9%
Lancashire + 12.3% +/- 0.6%
Leicestershire + 14.3% +/- 1.8%
Lincolnshire + 17.5% +/- 3.1%
London City of + 18.4% Nil
Merseyside + 7.9% +/- 0.4%
Metropolitan Police + 21.7% Nil
Norfolk + 11.7% +/- 1.1%
Northamptonshire + 17.2% Nil
Northumbria + 14.1% +/- 1.3%
North Yorkshire + 14.3% +/- 0.8%
Nottinghamshire + 9.4% Nil
South Yorkshire + 6.9% Nil
Staffordshire + 8.8% +/- 1.1%
Suffolk + 16.4% +/- 3.4%
Surrey + 16.7% +/- 2.9%
Sussex + 17.0% +/- 1.7%
Thames Valley + 9.2% +/- 1.7%
Warwickshire + 7.9% Nil
West Mercia + 17.8% +/- 2.0%
West Midlands + 13.8% +/- 1.8%
West Yorkshire + 11.1% Nil
Wiltshire + 15.8% +/- 2.3%
Dyfed-Powys + 37.7% +/- 3.4%
Gwent + 24.0% +/- 2.8%
North Wales + 19.9% Nil
South Wales + 11.5% Nil
All police force areas + 14.0% +/- 0.7%
“Nil” denotes that the police force double counted all crimes during 1998/99 and therefore is not
subject to sampling error.