1Hypothesis TestingLIR 832Lecture #3January 30, 2007Topics of the DayA. Our Fundamental Problem Again: Learning About Populations from SamplesB. Basic Hypothesis Testing: One Tailed Tests Using a Z StatisticC. Probability and Critical Cutoff Approaches: Really the Same ThingD. How do we do hypothesis tests on small samples (n = 30 or less).E. How do we do hypothesis testing when we have information on population standard deviation? On sample standard deviations?F. How do we test a statement such as (two tailed test)?G. How do we test for differences in means of two populations?µµ≥≤ −256orX=µ
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