Levels of Significance & Altering Decision Rules
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Can levels of significance and the decision rules (correlation analysis and regression analysis) be altered after a study is underway? Why (or why not)? What about sample sizes? Why?
When two variables are correlated, does this mean that we can conclude one variable caused the other? Why -- or why not?
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233 words discusses the influence of significance on decision rules and variable correlation.
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Typically, a level of significance is specified in the earlier part of the hypothesis testing process, before the test statistic based on sample data is calculated. However, the level of significance (and consequently the decision rule) can be altered after a study is underway to make a result more useful/ acceptable. For example, if we fail to ...
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