Spring2015-Exam1-StudyGuide

Spring2015-Exam1-StudyGuide - CHP9 HYPOTHESIS TESTING FOR A...

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CHP9: HYPOTHESIS TESTING FOR A SINGLE POPULATION Textbook Info: From 384 to 388 / from 390 to 410 Your turn 1 & 2 & 3 & 4 Topics 1. Formulate null and alternative hypothesis for two-tail and one-tail tests. 2. Hypothesis testing when standard deviation of the population is known Critical Value approach o STEP1: write down null and alternative o STEP2: find the critical z values from pink table and decide rejection and non-rejection regions o STEP3: find the z-stat, find where it falls (rejection/non-rejection region) and decide whether you reject or do not reject the null. o Interpret your finding P- Value approach o STEP1: write down null and alternative. o STEP2: find the p value and compare it to alpha to decide rejection and non-rejection regions. (If alpha is greater than p value then you reject null.) o Interpret your finding Confidence Interval approach o STEP1: write down null and alternative. o STEP2: find the confidence interval and check whether μ falls in this interval to decide rejection and non-rejection regions. (If μ does not fall in this interval then you reject
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