PPT-Hypothesis Tests

Excel GrowingKnowingcom 2011 1 GrowingKnowingcom 2011 There are 5 steps Step 1 State the null and alternative hypothesis Step 2 Select a confidence level Step 3 Determine the decision rule. . Testing. Martina Litschmannová. m. artina.litschmannova. @vsb.cz. K210. Terms Introduce in Prior Chapter. Population. . …. . all possible values. Sample. . …. a portion of the population. Note:. In Chapter 8 we used methods of estimating the value of a parameter.. In this chapter, we are drawing inferences about the parameter by making decisions concerning the value of the parameter. Two Hypothesis:. STAT 250. Dr. Kari Lock Morgan. SECTION 4.1. Hypothesis test. . Null and alternative hypotheses. . Statistical significance. Tea and the Immune System. L-. theanine. is an amino acid found in tea. 6. MSc in Computing (Data Analytics). Lecture Outline. Hypothesis Testing. Statistical hypothesis testing and confidence interval estimation of parameters are the fundamental methods used at the data analysis stage of a . 1. Contents:. Tests of significance for small samples. Student’s t- test. Properties of t-Distribution. The t- table. Application of the t-Distribution. To test the significance of . Mean of a random sample. 1. GrowingKnowing.com © 2011. Small Samples. If your sample size is below 30, this is a small sample so use the t table, not z.. Decision rule uses =. t.inv. instead of =. normsinv. Excel 2010: . 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.. 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?. (1-Sample). STEP 1, Null and Alternate Hypotheses. State the. “Null Hypothesis”. and . “Alternate Hypothesis”. STEP 1, Null and Alternate . Hypotheses. The Null Hypothesis is what we assume.. 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. . Chapter 9 Tests of Hypotheses for a Single Sample Applied Statistics and Probability for Engineers Sixth Edition Douglas C. Montgomery George C. Runger Chapter 9 Title and Outline 9 Tests of Hypotheses for a Single Sample 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 STAT 1450. Connecting Chapter 15 to our Current Knowledge of Statistics. Chapters 10 & 12 used information about a population to answer questions about a . sample. (e.g. ., 20% of people are smokers, what is the probability that a random sample of 2 people smoke. Another dummy variable coding scheme. Contrasts. Multiple comparisons. Interactions. One. -factor . Analysis of variance. Categorical . Explanatory variable. Quantitative . Response variable. p. categories (groups).