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
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
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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