Statistical significance versus practical sig

    • [PDF File]04752 CH09 0075

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      P < 0.05 and distinguish between the statistical significance of a result and its importance in clinical application. 25. Explain the following regarding statistical tests of significance: the power of a test, the relationship between significance tests and confidence inter-vals, one versus two-tailed tests, and comparison-wise versus study-wise

    • [PDF File]P Values, Statistical Significance & Clinical Significance

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      P Values, Statistical Significance & Clinical Significance When looking at the results of a research study, a practitioner has to answer two big questions: 1. Were the results due to chance? 2. Are the results big enough to matter to a patient? P values and Statistical Significance

    • [PDF File]The Difference between 'Significant' and 'Not Significant ...

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      The Difference Between "Significant" and "Not Significant" is not Itself Statistically Significant Andrew Gelman and Hal Stern It is common to summarize statistical comparisons by declara tions of statistical significance or nonsignificance. Here we dis cuss one problem with such declarations, namely that changes in statistical significance are ...

    • [PDF File]When is statistical significance not significant?

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      When is statistical significance not significant? ... Statistical significance testing has involved more fantasy than fact. (R. Carver) ... no information about the practical significance of an event, or about whether or not the result is replicable. More directly, Carver (1978; 1993) argues that all forms of significance ...

    • [PDF File]Stat 13, Intro. to Statistical Methods for the Life and ...

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      Stat 13, Intro. to Statistical Methods for the Life and Health Sciences. 0. SEs for percentages when testing and for CIs. 1. More about SEs and confidence intervals. 2. Clinton versus Obama and the Bradley effect. 3. Stat sig. versus practical significance. 4. Observational studies and …

    • [PDF File]The Strengths and Limitations of the Statistical Modeling ...

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      The Strengths and Limitations of the Statistical Modeling of Complex Social Phenomenon: Focusing on ... Statistical Significance From the output of parameter estimates, a researcher can ... Sig T for the predictors is examined if the probability is less

    • Statistical Equivalence Testing

      Statistical Equivalence Testing BEYOND O ne of the most common questions considered by ana-lytical chemists is whether replicate measurements are the same or significantly different from each other. The determination of significantly different results can be used to argue that a phenomenon is novel or to justify a claim of a sig-

    • When Is Statistical Significance Meaningful? A Practice ...

      The term "statistical significance" is especially problematic for the social worker with a mindset that is more within practice than within statistics. In a social work practice context, we be-come conditioned to think of significance as synonymous with importance. For example, we talk of "significant others" or "sig-

    • [PDF File]What is a P-value?

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      In using this kind of language, one should keep in mind the difference between statistical significance and practical significance. In a large study one may obtain a small P-value even though the magnitude of the effect being tested is too small to be of importance (see the discussion of power below).

    • [PDF File]The Difference Between Signi cant and Not Signi cant is ...

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      The Difference Between Signi cant and Not Signi cant is not Itself Statistically Signi cant Andrew G ELMAN and Hal S TERN ... statistical signiÞcance are often not themselves statistically sig-niÞcant. By this, we are not merely making the commonplace ... practical importance, that dichotomization into signiÞcant and ...

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