PDF-Assumptions and Conditions for Hypothesis Testing The

But there are conditions that we can test that may verify that an assumption is plausible or override an assumption that is violated Some procedures can provide very reliable results even when an assumption is not fully met In this case a condition. ©2013 Michael J. Rosenfeld. Draft date: 1/14/2013. The sample frame, or sample universe, is the data that our sample is drawn from. In the case of the March, 2000 CPS, the sample universe includes all people residing in the US in March, 2000, who were not living in institutional settings. This sample frame has N members.. Often Unstated; Always Unavoidable. Two Kinds of Assumptions. Prescriptive Assumptions . assume the writer and reader share the same values. They concern the way someone thinks the world . should be.. Mr. Mark Anthony Garcia, M.S.. Mathematics Department. De La Salle University. Situation: Hypothesis Testing. Suppose that a political analyst predicted that senatorial candidate A will top the upcoming senatorial elections in city X with at least 0.70 or 70% of the votes.. VON CHRISTOPHER G. CHUA, LPT, MST. Affiliate, ESSU-Graduate School. MAED 602: STATISTICAL METHODS. Session Objectives. In this fraction of the course on Statistical Methods, graduate students enrolled in the subject are expected to do the following:. Test of hypothesis - Test whether a population parameter is less than, equal to, or greater than a specified value.. Remember an inference without a measure of reliability is little more than a guess.. nd. type of formal statistical inference. Our goal is to assess the evidence provided by data from a sample about some claim concerning the population.. Remember: We are asking ourselves “What would happen if we repeated the sample or the experiment many times?”. Writing a Hypothesis. Quick Questions. What do we remember about testable questions?. What is a hypothesis?. What do hypotheses have in common with testable questions?. How do we write a hypothesis?. Q. uestion. R. andom guess. Observation. Experiment. Your mom. A . hypothesis is:. A . tentative explanation . for an observation or a scientific problem that can be tested by further investigation. . Sample. , shape, location, and spread. Sample = make sure it's random, handle missing data (mcar, mar, nmar), imputation . methods. NMAR!. . Shape = Is the data skewed, normal, or flat? If normal then we can use statistical analysis for normal . Evaluating Differences and Changes. “Our overall customer satisfaction score increased from 92 percent 3 months ago to 93.5 percent today.” . Did customer satisfaction really increase? Should we celebrate?. Frances Chumney, PhD CONTENT OUTLINE  Logic of Hypothesis Testing  Error & Alpha  Hypothesis Tests  Effect Size  Statistical Power HYPOTHESIS TESTING 2 HYPOTHESIS TESTING LOGIC OF HYPOT Are the Results Convincing?. We keep talking about . statistical significance. .. Now that we know the standard deviation of a proportion, . we’re . really in business.. If a statistic we observe is more than 2 standard deviations from the proportion we expect, we are ready to say we have a statistically significant difference.. Bonnie Halpern-Felsher, . PhD. Hypothesis Testing. Hypothesis testing is the key to our scientific inquiry. . In additional to research hypotheses, need . statistical hypotheses. .. I. nvolves . the statement of a null hypothesis, . Descriptive. Inferential. Differences. Associative. Predictive. What are the characteristics of the respondents?. What are the characteristics of the population?. Are two or more groups the same or different?.