Statistically relevant sample size calculator

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

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      Important Note ! All an ANOVA test can tell you is whether there are statistically significant diff erences somewhere in the data as a whole. But it cannot tell you just where those differences lie. For example, run an ANOVA on the data above, and you’ll get a very low p­value.

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    • [PDF File]Sample size and power calculations made simple

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      of sample size calculations, including the purpose, ... Content: The process of sample size calculations, including relevant definitions, is explained and clear ... Just because a result is statistically significant, this does not mean it is substantive in effect. For exam-

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    • [PDF File]SAMPLING FOR INTERNAL AUDITORS - ISACA

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      WHY DO AUDITORS SAMPLE? International Standards for the Professional Practice of Internal Auditing: Guides Information should be: Sufficient, Reliable, Relevant & Useful Acknowledges Sampling Techniques in Evidence Acquisition Opinions are NOT ABSOLUTE GUARANTEE but REASONABLE ASSURANCE of Accuracy Proficiency & Due Professional Care

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    • [PDF File]Sampling Strategies for Error Rate Estimation and Quality ...

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      sample size has no statistical significance. The goal is to create a tool which will provide John Hancock with a properly sized sample of work items to screen for each employee. The resultant sample size is a function of historical employee performance and desired confidence.

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    • [PDF File]Statistics: An introduction to sample size calculations

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      your sample size you increase the precision of your estimates, which means that, for any given estimate / size of effect, the greater the sample size the more “statistically significant” the result will be. In other words, if an investigation is too small then it will not detect results that are in fact important.

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    • [PDF File]Designing a Statistically Sound Sampling Plan

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      zIncreasing the sample size increases the precision of the sample estimate zIf we take a large sample then the sample mean is closer (in distribution) to the population mean 425 475 525 Gorilla Weights Average of Four Ave of 25 weights. ... Designing a Statistically Sound Sampling Plan

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    • SAMPLE SIZE: HOW MANY IS ENOUGH? - Griffith University

      sample size is required for a two-tailed test than for a one-tailed test. Different sample size formula are required depending on the research underlying statistical test, for example a t-test for comparing two means, a z-test for comparing two proportions or a log-rank test in time to event analyses. The sample size formula provided in this paper

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    • Sample Size Considerations for Multiple Comparison ...

      Sample Size Considerations for Multiple Comparison Procedures in ANOVA Gordon P. Brooks George A. Johanson Ohio University, Athens, Ohio USA Adequate sample sizes for omnibus ANOVA tests do not necessarily provide sufficient statistical power for post hoc multiple comparisons typically performed following a significant omnibus F test. Results

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