Chapter 8_Hypothesis testing and inferential statistics.ppt

Chapter 8_Hypothesis testing and inferential statistics.ppt...

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Hypothesis Testing and Inferential Statistics
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Research Descriptive research to describe the current state of affairs exploratory data analysis Correlational and Experimental research investigate relationship between variables Predict Explain hypothesis testing confirmatory data analysis
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Probability and Inferential Statistics Hypothesis testing Conceptually: Men have a stronger sex drive (motivation) than women Operationally: Men desire sex more frequently than women Determining the likelihood that the data observed reflect a real relationship between variables ( H1 )rather than a relationship due to chance ( H0 ) Inferential statistics
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Hypothesis testing Research Hypothesis Set alpha (usually α = .05) XXXXXXXXXX Calculate statistic and the p -value Compare the p -value to α p < .05 p > .05 Reject H 0 Accept H 0
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Sampl ing Distribution Distribution of a sample statistic Sample distribution – raw scores Sampling distribution “What would the world be like if a person repeatedly took samples of size N from the population distribution and computed a particular statistic each time What values we might expect to obtain for a particular statistic under a set of predefined conditions
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Chapter 8_Hypothesis testing and inferential statistics.ppt...

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