PPT-  CHAPTER EIGHT TESTS OF HYPOTHESES

81 Definition A statistical hypothesis is a statement concerning one population or more 811 The Null and The Alternative Hypotheses The structure of hypothesis testing will be formulated with the use of the term null hypothesis This refers to any hypothesis we wish to test that called The rejection of leads to the acceptance of an alternative hypothesis denoted by . brPage 1br 6WRKQV Elite Eight MARCH 28 29 Elite Eight MARCH 28 29 Final Four APRIL 4 Final Four APRIL 4 Sweet 16 MARCH 26 27 Sweet 16 MARCH 26 27 Third Round MARCH 21 22 Third Round MARCH brPage 1br 6WRKQV Elite Eight MARCH 28 29 Elite Eight MARCH 28 29 Final Four APRIL 4 Final Four APRIL 4 Sweet 16 MARCH 26 27 Sweet 16 MARCH 26 27 Third Round MARCH 21 22 Third Round MARCH Virginibus Puerisque: Function of the Human Foreskin Considered from an Evolutionary Perspective COX Microscope Unit, University of Sydney, Sydney, NSW 2006, Australia (Tel: (+61) 2 351 3176; Fax: (+ Prodipto. . Ghosh. , . Ph.D. Distinguished Fellow. The Energy & . Resources Institute. The Terrain of Equity in Climate Change. Securing the interest (and involvement of) future generations . Obligations of Parties in . Sources: D. Jensen. “Research Methods for Empirical Computer Science.”. . William M.K. . Trochim. . “Research Methods Knowledgebase”. More on Causality. What is causality?. What’s Important About Causality?. an . overview. Doug Levey (Dept. Biology). Take home messages. Start small (but above all, . start!. ). Proposal writing is a . skill. , requiring practice. Don’t be afraid of failure. Seek mentoring. Question 1. Question: What role do hypotheses play in scientific inquiry?. Answer: A . hypothesis. provides a . testable. explanation for an observation.. Question 2. Question: What is the difference between an independent variable and a dependent variable?. Constructivist theory of psychological perception . Dominant view in perceptual and cognitive psychology since the 1960’s. Perceiving and thinking are active, goal oriented processes . The “searchlight “ theory of the mind. Statistical . tests. Descriptive. . statistics. : . Description . of. . observations. Probability. . theory. : . Theoretical. . considerations. . (. no. . empirical. . data. ). Statistical . tests. Given data to explain, search for possible explanaiers (hypotheses). Score them. Assemble them into a composite explanation. Hypothesis Assembly Algorithm. Look for essential hypotheses. a hypothesis that is the only way to explain some data. Given data to explain, search for possible explanaiers (hypotheses). Score them. Assemble them into a composite explanation. Hypothesis Assembly Algorithm. Look for essential hypotheses. a hypothesis that is the only way to explain some data. Cognitive & Non Cog Abilities. Personality. Criteria. Chap 3 Developing Predictive Hypotheses. 1. Conceptual & Operational Definitions. Predictors & Criteria. F. Kerlinger’s definitions. Score them. Assemble them into a composite explanation. Hypothesis Assembly Algorithm. Look for essential hypotheses. a hypothesis that is the only way to explain some data. Include/propagate/remove (see the next slide) and repeat from top. 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.