Making the Most of Statistical Analyses: Improving Interpretation and Presentation
2000/04/01 by Gary King, Michael Tomz, Jason Wittenberg · 42 citations
Mathematics · Computer Science · #Statistics Education and Methodologies #Data Analysis with R
paper · doi:10.2307/2669316
Abstract
W e show that social scientists often do not take full advantage of the information available in their statistical results and thus miss opportunities to present quantities that could shed the greatest light on their research questions. In this article we suggest an approach, built on the technique of statistical simulation, to extract the currently overlooked information and present it in a reader-friendly manner. More specifically, we show how to convert the raw results of any statistical procedure into expressions that (1) convey numerically precise estimates of the quantities of greatest substantive interest, (2) include reasonable measures of uncertainty about those estimates, and (3) require little specialized knowledge to understand. The following simple statement satisfies our criteria: “Other things being equal, an additional year of education would increase your annual income by 1,500 on average, plus or minus about 500.” Any smart high school student would understand that sentence, no matter how sophisticated the statistical model and powerful the computers used to produce it. The sentence is substantively informative because it conveys a key quantity of interest in terms the reader wants to know. At the same time, the sentence indicates how uncertain the researcher is about the estimated quantity of interest. Inferences are never certain, so any honest presentation of statistical results must include some qualifier, such as “plus or minus 500” in the present example. Making the Most of Statistical Analyses: Improving Interpretation and Presentation
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