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Unformatted text preview: Sections 4.2 and 4.3 Page 1 Hypothesis Testing Basic Idea h Interested in testing a claim. h State hypothesis h Use sample evidence and probability to test claims regarding a characteristics of one or more populations Steps in Hypothesis Testing 0. Check Assumptions 1. State Hypotheses and Set 2. Compute the Test Statistic 3. Find the critical region or calculate pvalue 4. Draw Conclusion Step 0 Checking Assumptions h Data must be from a SRS o Determine from the description of how the sample was obtained. h The population from which we sampled must be normally distributed or the sample size is sufficiently large (n 30) o Check using a QQ plot! Step 1 Stating the Hypotheses h H 0 the null hypotheses what is thought to be true, historically true. This is assumed to be true until evidence is found against it. h H a the alternative hypothesis what the research believes to be true now h 3 ways to set up the hypotheses o Equal vs Not EqualTwo tailed test s H : ( parameter) = ( value) s H a : ( parameter) ( value) o Equal vs Greater ThanOne tailed test s H : ( parameter) = ( value) s H a : ( parameter) > ( value) o Equal vs Less ThanOne tailed test s H : ( parameter) = value s H a : ( parameter) < value Sections 4.2 and 4.3 Page 2 Example....
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 Spring '10
 Wheatley
 Probability

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