What does statistically significant mean

    • [PDF File]Results should not be reported as statistically ...

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      Statistical significance 2013 08 12 1 Results should not be reported as statistically significant or statistically non-significant “Statistical significance” is so commonly misreported and …

    • [PDF File]Is it statistically significant? The chi-square test

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      Steps to follow • State the hypothesis • Calculate the expected values • Use the observed and expected values to calculate the chi-square test statistic • Establish the significance level you need (usually 95% p = 0.05) and the number of degrees of freedom • Compare the chi-square statistic with the critical value from the table • Make a decision about your hypothesis

    • [PDF File]Differentiating statistical significance and clinical ...

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      statistically significant difference is clinically significant. across multiple patient populations, the statistically significant result may be only minimally useful and thus isn’t clinically significant. If a statistically significant result isn’t clinically significant, it’s not clinical-ly helpful and shouldn’t be used to

    • [PDF File]Statistical and Scientific Significance

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      Statistical and Scientific Significance Query In relation to a predictor being statistically significant your notes (attached) say that such a variable plays some role in prediction. This suggests that we cannot be definitive that it definitely does play a role. Am I right in believing that …

    • [PDF File]The End of Statistical Significance? - Vanderbilt University

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      The End of Statistical Significance? Jonathan Sterne Department of Social Medicine, University of Bristol UK ... statistically significant ... population with mean 24.2 and s.d. 5.9. The sample means vary around the population mean m M e a n a n d 9 5 % c o n f i d e n c e i n t e r v a l

    • [PDF File]Research Rundowns >Quantitative Methods > Significance ...

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      Research Rundowns >Quantitative Methods > Significance Testing (t-tests) In this review, ... of a mean is a region within which a score (like mean test score) may be said ... statistically significant difference between the two teaching teams, team 1 (M = 818.92, ...

    • Statistical versus Practical Significance - The Atrium

      To review, when a difference is statistically significant, it does not necessarily mean that it is big, important, or helpful. It simply means you can be confident that there is a difference. Effect size is a measure of the strength of the relationship between two variables. In a …

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

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      cally trichotomized approximately into highly significant, marginally significant, and not statistically significant at conventional levels, with cutoffs at p≤0.01, p≤0.05 and p>0.10 (Gelman, 2012: 2). According to Cramer and Howitt (2004), The level at which the null hypothesis is rejected is usually set as 5 or fewer times out of 100.

    • [PDF File]Overlapping Confidence Interval and Statistical Significance

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      which yields (1.09, 14.91). The interval does not contain zero, hence we reject the null hypothesis that the group means are the same. Generally, when comparing two parameter estimates, it is always true that if the confidence intervals do not overlap, then the statistics will be statistically significantly different.

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

      whether a statistically significant relationship between variables is meaningful for them. A review of both the concept of statis-tical significance and how it is achieved is helpful in making this important distinction. The term "statistical significance" is especially problematic

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