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February 27, 2008 - dependent variable is due to the...

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February 27 Outline I. Using the binomial distribution (cont.) A. When P > .50 B. Problems involving “a result as extreme as…” II. Binomial distribution as N gets large III. Chapter 10: Hypothesis testing IV. The logic of hypothesis testing A. Hypotheses 1. Alternative hypothesis (H 1 ) 2. Null hypothesis (H 0 ) B. Testing the null hypothesis 1. Why? 2. Compute chance probability from sample results 3. Compare with alpha level 4. Decision a. Reject H 0 (accept H 1 ) b. Retain H 0
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Hypothesis testing: researcher draws inferences regarding a hypothesis about a population Alternative hypothesis (H 1 ): the hypothesis that claims that the effect on the
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Unformatted text preview: dependent variable is due to the independent variable Null hypothesis (H ): the hypothesis that whatever effects there are on the dependent variable are NOT due to the independent variable but due to chance; the logical counterpart of the alternative hypothesis, such that if the null hypothesis is false the alternative hypothesis must be true Alpha level ( α ): the level to which the experimenter wishes to limit the probability of rejecting the null hypothesis when it is true (Type I error)...
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