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Unformatted text preview: Reliability of the means Reliability of the means & t tests & t tests Lecture Six Lecture Six Spring 2008 Spring 2008 Background of Statistical Tests Background of Statistical Tests Population Population Sample Sample Inference from sample to population Inference from sample to population It must be taken from identified population It must be taken from identified population It must be sufficiently large It must be sufficiently large Research Procedure Research Procedure Null hypothesis Null hypothesis Statistical test Statistical test Reject if the probability is quite small Reject if the probability is quite small Accept and the difference considered Accept and the difference considered sampling error sampling error Probability level selection Probability level selection Probability level (p) <0.05/0.01 reject Probability level (p) <0.05/0.01 reject P> 0.05/0.01 accept P> 0.05/0.01 accept tTests tTests ttest for one group ttest for two independent groups ttest for two dependent groups...
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 Spring '08
 FuroungXi

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