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[DOC File]Chapter 1 Outline
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Statistical Errors 354. Statistical Significance 355. 1-Tailed vs. 2-Tailed Tests 356. Parametric Statistics 357. Assumptions Underlying a Parametric Statistic 358. Inferential Statistics with 2 Samples 358. t test 358. t test for Independent Samples 358. t test for Correlated Samples 359. Contrasting 2 Groups: Example from the Literature 359
practical significance definition

Statistical Versus Clinical Significance in Psychiatry
A good example of the difference between significance and magnitude comes from a recent, well-designed study of topiramate in the treatment of alcoholism (Johnson et al., 2007).
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[DOC File]STATISTICS - SUMMARY
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Statistical significance versus practical significance. Hypothesis tests merely test how confidently we can generalize from what was found in the sample to the population we have sampled from. It assumes random sampling thus, you cannot do statistical hypothesis tests from a non probability sample or a …
statistical and practical results

[DOC File]MULTIPLE REGRESSION AND CORRELATION
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Multiple Regression Models and Significance Tests. Many practical questions involve the relationship between a dependent or criterion variable of interest (call it Y) and a set of k independent variables or potential predictor variables (call them X1, X2, X3,..., Xk), …
statistical and practical significance

[DOC File]Guide to calculating, interpreting and using effect size
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An effect size is exactly equivalent to a ‘Z-score’ of a standard Normal distribution. For example, an effect size of 0.8 means that the score of the average person in the experimental group is 0.8 standard deviations above the average person in the control group, and hence exceeds the scores of …
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[DOC File]Hypothesis Test for a Population Mean
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Statistical versus Practical Significance. When the value of the test statistic falls in the rejection region, it is customary to say that the result is statistically significant at the chosen level However, a statistically significant result may not having any practical consequences.
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[DOC File]Numerical Examples for Statistical Tables
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The following presents some numerical examples of common statistical tables with some applications. ... Testing hypotheses on mean, variance unknown Given xbar16 = 12.1 and S2 = 2.225, test = 12.5 vs 12.5, at = 0.05 significance level. ... Example: if d.f. = = 15, and = 0.975 find the 2 value. From the 2 table, we get 2 =6.26 Using The P-values ...
difference between statistical and clinical

[DOC File]Classification of Statements in Science
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Statistical significance vs. practical significance (what Giere calls effectiveness) Relationship between correlation and causation Varieties of causal structures – proximate vs. ultimate causes, common cause, screened-off causal factors
practical significance statistics definition

[DOC File]I
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practical significance. Substantive importance. Statistical significance does not ensure practical significance, since, with large samples, small differences can be statistically significant. probability distribution. The process that generates the values of a random variable.
practical significance definition

[DOC File]Probabilities of Clinical or Practical Significance
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) that I am using for a seminar with the title Statistical vs Clinical or Practical Significance. The presentation includes the following points: An outline of the meaning and shortcomings of hypothesis testing, P values and statistical significance.
example of practical significance

Practical vs statistical significance example