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Difference of Means T-test and the British Crime Survey (2007–2008): Confidence in the Police and Area of Residence

Dataset
By: Nick Allum Published: 2015 | Product: SAGE Research Methods Datasets
Methods: T-test
Data Type: Survey
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Abstract

This dataset example introduces difference of means t-tests. This method allows researchers to compare the means of a single variable for two subsets of the data to evaluate whether the means for those two subsets are statistically significantly different from each other or not. This technique builds on the single mean t-test.

This example describes the difference of means t-test, discusses the assumptions underlying it, and shows how to compute and interpret it. There are many variants of difference of means testing - this example focuses on the independent samples t-test. We illustrate this using a subset of data derived from the 2007 British Crime Survey. Specifically, we test whether people who live in rural areas have a different level of confidence in the police compared ...

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About This Dataset
Data Source Citation

University of Manchester. Cathie Marsh Centre for Census and Survey Research. ESDS Government, British Crime Survey 2007–2008: Unrestricted Access Teaching Dataset [computer file]. Home Office. Research, Development and Statistics Directorate, BMRB. Social Research, [original data producer(s)]. Colchester, Essex: UK Data Archive [distributor], November 2011. SN: 6891.

Full title of originating dataset

British Crime Survey 2007–2008: Unrestricted Access Teaching Dataset

Data author(s) and affiliations

University of Manchester. Cathie Marsh Centre for Census and Survey Research. ESDS Government

First publication date

10 November 2011

Data Universe

National

Adults aged 16 and over in private households in England and Wales during 2007–2008.

Funding sources/suppliers

Economic and Social Research Council Higher Education Funding Councils. Joint Information Systems Committee

Sample/sampling procedures

Multi-stage stratified random sample

Weighting

Weighting used. See documentation for details.

Data collection dates

April 2007–March 2008

Time frame of analysis

Cross-sectional (one-time) study The BCS is an annual cross-sectional study, but this teaching dataset has been compiled using only data from the 2007-2008 survey.

Unit of analysis

Individual

Location covered by data

England and Wales

Other sources

The data are taken from the British Crime Survey, 2007-2008, which is available from the UK Data Archive under SN 6066.

Links to SRM content
  • Salkind, N. (2007). T Test for Two Population Means. In Neil J. Salkind, & K. Rasmussen (Eds.), Encyclopedia of Measurement and Statistics. (pp. 991-993). Thousand Oaks, CA: Sage Publications, Inc. doi: http://dx.doi.org/10.4135/9781412952644.n451
  • t test for unrelated samples. (2004). In Duncan Cramer, & D. Howitt (Eds.), The SAGE Dictionary of Statistics. (p. 168). London, England: SAGE Publications, Ltd. Retrieved from http://dx.doi.org/10.4135/9780857020123.n588
  • Shapiro, J. (2008). t-Test. In Paul J. Lavrakas (Ed.), Encyclopedia of Survey Research Methods. (pp. 912–913). Thousand Oaks, CA: Sage Publications, Inc. doi: http://dx.doi.org/10.4135/9781412963947.n594
List of variables

polatt1

the police in this area can be relied on to be there when you need

polatt2

the police in this area would treat you with respect if you had contact with them

polatt3

the police in this area treat everyone fairly regardless of who they are

polatt4

the police in this area can be relied on to deal with minor crimes

polatt5

the police in this area understand the issues that affect this community

polatt6

the police in this area are dealing with the things that matter to this community

confpol2

Confidence in the police

rural2

type of area 2004: urban/rural

whitebritish

Ethnic group