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Crim 320 week 12.docx

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Simon Fraser University
CRIM 320
Patrick Lussier

thMarch 26 2012 Crim 320 Research Methods in Criminology Crim 320 Bivariate Correlation and Partial correlation Bivariate CorrelationBivariate correlationKarl Pearsons ProductMoment Correlation f Bivariate CorrelationTopics o What is a correlation o When it should and should not be used o What are the underlying assumptions o How to conduct a correlation o How to test simple hypothesis ContextTwo continuous ratiointerval variablesAssociation between two variables rxyExploration purposeInvestigate relationship before conducting multivariate analysis The mean score is very important therefore you cant use categorical variables There is a hypothesis that lower iq is likely to be convicted but not more selfreported delinquency More delinquent friends may be associated with more self reported delinquency But a third variable could be that they participants also have a delinquent member in the familyLarger family sizedelinquency Third indicatorsupervision Bivariate CorrelationResearch question o Is there a rs bw age of onset the criminal career and the volume of crime committedHypothesis o H1 the earlier the age of onset of delinquency the more crimes will be committedNull hypothesiso H0 The age of onset of delinquency is not related to the number of crimes committed
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