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Difference of Means T-test and Time Sharing Experiments for the Social Sciences (2013): Opinions About Welfare Recipients

Dataset
By: Nick Allum Published: 2015 | Product: SAGE Research Methods Datasets
Methods: T-test
Data Type: Survey Experiment
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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 an experiment in political psychology: the Salience of National Indentity and Americans’ Orientations Toward Subgroups. This experiment was carried out as part of the Time-Sharing ...

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About This Dataset
Data Source Citation

Time-sharing Experiments for the Social Sciences. (2013). The Salience of National Identity and Americans’ Orientations Toward Subgroups (Publication., from Northwestern University: http://www.tessexperiments.org/data/Gilens419.html

Full title of originating dataset

The Salience of National Identity and Americans’ Orientations Toward Subgroups. Time-Sharing Experiments for the Social Sciences (TESS) 2013

Data author(s) and affiliations

Martin Gilens

Princeton University

Funding sources/suppliers

NSF Grant 0818839

Sample/sampling procedures

Addressed Based Probability sample of panel members, with data collection via web survey.

Weighting

Weighting for selection probabilities and post stratification.

Data collection dates

13/11/2013–27/11/2013

Time frame of analysis

2013

Unit of analysis

Adult American Residents

Location covered by data

United States of America (contiguous states)

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

flag

welfare

Please indicate how favorable or unfavorable you feel toward each of the following groups: People on welfare

immigrant

Please indicate how favorable or unfavorable you feel toward each of the following groups: Immigrants