PPT-S2 HYPOTHESIS

TESTING The process for setting up a hypothesis test State the statistical model State your NULL HYPOTHESIS H 0 State your ALTERNATE HYPOTHESIS H 1 State the significance level Test your statistic against. 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:. Program Director. Functions of Behavior. There are four functions of behavior that have been found through research.. Attention, Escape, Automatic, and Access to Tangibles. Iwata created a Functional Analysis as a way to assess functions of behaviors. Ho - this hypothesis holds that if the data deviate from the norm in any way, that deviation is due strictly to chance.. Alternative hypothesis. Ha - the data show something important.. Doing decision = accept/reject Ho (the decision centers around null hypothesis). Hypothesis: a reasonable statement that can be tested (predicts). Law: statement or mathematical expression of something that always happens; testable (describes). Theory: broad generalization that is based on observation, experimentation, and reasoning; not testable; is modified as new information is discovered (explains). Inferential statistics. :. Based on laws of probability. Used to estimate population parameters from sample statistics . When different researchers apply inferential statistics to the same data resulting conclusions likely to be the same. Introduction. Researchers interesting in many types of questions. Earth warming. Medication effect on blood pressure. Seat belts and accidents. Are differences in means of populations and means of samples real, or by chance?. 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. . 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. . Alan Ward. Data first . vs. Hypothesis first. Hypothesis driven approach. Look at the data we have. Formulate an hypothesis about ... Do experiments to test the hypothesis. As a byproduct, collect more data. Type I & II Error and Test of 1 &2 Tailed Hypothesis Khagendra Kumar Dept. of Education Patna University Decision Making on Accepting & Rejecting Hypotheses  To take decision for accepting or Inferential Statistics: Making inferences about populations based on samples. Chapter Outline. Hypothesis-Testing. One-Tailed and Two-Tailed Hypothesis Tests. Decision Errors. Decision Errors. When the right procedures lead to the wrong decisions.