... meaning of the p value such as 0.05? Put more precisely what is being tested and where does it fit into data analysis and research if at all? This essay will unravel what exactly is tested by statistical significance tests, the role of replicability to the progression of scientific knowledge, significance testing based on the falsificationist approach to science and the topic of effect sizes. Currently, most researchers will employ hypothesis testing involving a computation of the p value (Thompson 1996). However the problem arises too frequently that often researchers (and publishers of these papers) do not understand what their computed p-values actually represent (Carver 1993). Therefore we must turn to the question what are p-values and what do they measure? Currently traditional inferential statistics taught include the t ratio, the F ratio, the chi-square analysis, analysis of variance (ANOVA) and additional methods that test statistical significance. These procedures result ...

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