How to calculate statistical significance

    • [PDF File]Running a t-test in Excel - Roger Williams University

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      Running a t-test in Excel ... program to perform some statistical tests. However, the shortcut described at the end of this document will work on both ... If all you are interested in is the p-value, a quick way to calculate this is by entering the following syntax directly into a cell: =T.TEST(array1, ...

    • [PDF File]How To Run Statistical Tests in Excel - cbgs.k12.va.us

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      How To Run Statistical Tests in Excel Microsoft Excel is your best tool for storing and manipulating data, calculating basic descriptive statistics such as means and standard deviations, and conducting simple mathematical operations on your numbers. It can also run the five basic Statistical Tests.

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

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      • 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 • …

    • [PDF File]Chapter 7: Statistical Significance, Effect Size, and ...

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      Chapter 7: Statistical Significance, Effect Size, and Confidence Intervals . I. Overview . a. The key to all inferential statistics is the test for statistical significance

    • [PDF File]Overlapping Confidence Interval and Statistical Significance

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      Overlapping Confidence Intervals and Statistical Significance . October 2008 . In this issue of StatNews, we address the question: can we judge whether two statistics are significantly different depending on whether or not their confidence intervals overlap? The answer is: not always. If two statistics have

    • [PDF File]Statistical Significance, Effect Size, and Practical ...

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      Statistical Significance, Effect Size, and Practical Significance Eva Lawrence Guilford College October, 2017 Definitions Descriptive statistics: Statistical analyses used to describe characteristics of a sample. Inferential statistics: Statistical analyses used to draw conclusions about a population based on a …

    • [PDF File]THE MEANING OF STATISTICAL SIGNIFICANCE: STANDARD …

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      STATISTICAL SIGNIFICANCE: STANDARD ERRORS AND CONFIDENCE INTERVALS . LOGISTICS ... Dependent on desired significance level Bands around the regression line 95% confidence interval ±1.96 x SE . Central limit theorem: If the N of each sample drawn is large, regardless of the

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

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      When is statistical significance not significant? Dalson Britto Figueiredo Filho Political Science Department, Federal University of Pernambuco (UFPE), Brazil Ranulfo Paranhos Social Science Institute, Federal University of Alagoas (UFAL), Brazil Enivaldo C. da Rocha Political Science Department, Federal University of Pernambuco (UFPE), Brazil

    • [PDF File]Effect size, confidence interval and statistical ...

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      changing statistical practice for the better in the biological sciences. Key words: Bonferroni correction, confidence interval, effect size, effect statistic, meta-analysis, null hypothesis significance testing, p value, power analysis, statistical significance. CONTENTS

    • [PDF File]What does the p value really mean? - SciELO

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      What does the p value really mean? Juliana Carvalho Ferreira1,3, Cecilia Maria Patino2,3 Why calculate a p value? Consider an experiment in which 10 subjects receive a placebo, and another 10 receive an experimental diuretic. After 8 h, the average urine output in the placebo group is 769 mL, versus 814 mL in the diuretic group—a difference

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