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Unformatted text preview: if the independent variable has a real effect Real effect: an effect that produces a change in the dependent variable P null : the probability of getting a plus with any participant in the sample of an experiment when the independent variable has no effect (P null = .50) P real : the probability of getting a plus with any participant in the sample of an experiment when the independent variable has a real effect; also, the proportion of pluses in the population if the experiment were done on the entire population and the independent variable has a real effect...
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 Spring '08
 JamesAntes
 Statistics, Statistical significance, Effect size, real effect, A. Pnull B. Preal

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