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[DOC File]Power and Sample Size Calculation
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Factors that affect statistical power include the sample size, the specification of the parameter(s) in the null and alternative hypothesis, i.e. how far they are from each other, the precision or uncertainty the researcher allows for the study (generally the confidence or significance level) and the distribution of the parameter to be estimated.
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[DOC File]Section 1
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Explain the logic of significance testing. List and explain the differences between a null hypothesis and an alternative hypothesis. Discuss the meaning of statistical significance. Use the Inference Toolbox to conduct a large sample test for a population mean. Compare two-sided significance tests and confidence intervals when doing inference.
significance 0.05

[DOC File]DeKalb Early College Academy
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Refer to Exercise 11. What conclusion would you make if α = 0.05? If α = 0.01? Justify your answers. 17. Interpreting a P-value. When asked to explain the meaning of the P-value in Exercise 13, a student says, “This means there is about a 22% chance that the null hypothesis is true.” Explain why the student’s explanation is wrong.
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[DOC File]Commentary on Making Meaningful Inferences About …
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Batterham and Hopkins have proposed a new approach for reporting the statistical findings from research studies. Their technique combines information on the magnitude of the estimate of the effect (e.g., mean difference), the degree of imprecision about that effect (e.g., the confidence interval), and the smallest difference that has real-world ...
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Statistical Versus Clinical Significance in Psychiatry
Conventionally, a probability of 1 in 20 (0.05) is taken as an arbitrary cut-off. If the probability value given by the statistical test is greater than 0.05, then one cannot believe beyond ...
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[DOC File]Ms. McClelland's Math Pages - Home
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PTS: 1 REF: Quiz 9.1A TOP: Significance Tests: The Basics. 2. ANS: (a) State: We wish to test, where = mean copper level in all possible water samples from the new source, in mg/liter. We are using a significance level of = 0.05. Plan: The procedure is a one-sample t-test for a mean.
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[DOCX File]d3amtssd1tejdt.cloudfront.net
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0. 329. Unpaired. t . test. results. P value and statistical significance: The two-tailed P value equals 0.0002 By conventional criteria, this difference is considered to be extremely statistically significant. The result is significant at . p < .05.
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[DOCX File]Statistical Tests - Loudoun County Public Schools
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21. What is the meaning of a two-tailed test? If you are using a significance level of alpha = 0.05, a two-tailed test allots half of your alpha to testing the statistical significance in one direction and half of your alpha to testing statistical significance in the other direction.
statistical significance 0.05

[DOCX File]www.edventure-ga.com
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(Two other analyses of the data did not reach p
p 0.05 statistical significance

[DOC File]Florida Gulf Coast University
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Ho: the model has no statistical significance (b1=0) Ha: the model has statistical significance (b1=/=0) see ANOVA table for the significance (or p-value) of the F test* since p-value of F is < alpha of 0.05, reject H0 and conclude Ha. B1=/=0 and the model has statistical significance part b.
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Statistical significance 0 05 meaning