chapters+04 - HypothesisTesting, Power&Control Chapter4...

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Hypothesis Testing,  Chapter 4
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Types of Hypothesis Conceptual Hypotheses State relationship(s) between concepts Research Hypotheses Concepts are operationalized based on how  variables are to be measured Statistical Hypotheses Based on the research hypothesis Stated in terms of population parameters
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From Stats… Null Hypothesis There is no difference between groups. There is no change between conditions. Alternative Hypothesis There is a difference between groups. There is a change between conditions.
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Testing the Null Hypothesis Remember we always test against the Null Null predicts nothing is going on Alternative predicts something happened Alternative is closest to the Research Hypothesis When null is shown to be incorrect (ie  rejected), then it provides support for the  belief that the alternative is true Does NOT prove it, just supports it NOTE: Meaning of “accept” the alternative in  book
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Why not “accept” or “prove”? True State of Affairs
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chapters+04 - HypothesisTesting, Power&Control Chapter4...

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