PPT-Hypothesis and Variables

Step 3 Form a Hypothesis Hypothesis a testable explanation of an observation A hypothesis is NOT just an educated guess about what you think will happen It must be able to be tested . Hypothesis. testing. The process of making judgments about a large group (population) on the basis of a small subset of that group (sample) is known as statistical inference.. Hypothesis testing, one of two fields in statistical inference, allows us to objectively assess the probability that statements about a population are true. . ©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.. Types of Variables. There are 2 main types of variables: . Independent Variable: . The variable that is changed by the scientist; the ‘. I control. ’ variable. Dependent Variable: . The variable that might change because of what the scientist changes – what is being measured . Hypothesis Testing and . p. -Values. Learning Objectives. Review Lectures 8 and 9. Understand and develop research hypotheses and know difference between them and the null hypothesis. Define independent and dependent variables for a . Psychological Investigations . Suzie’s goldfish lives in a tank on her desk. The more fizzy drinks she consumes, the more her fish swims around.. Can we say there is cause and effect?. Goldfish and Fizzy Drinks... +. Probability. Seminar 6. A difficult mock question for mid-term. Plot . the following graph. People . who use Facebook only (but not Twitter) are generally happier than those who use Twitter only (but not Facebook). This . Dr. Anshul Singh Thapa. There are number of consideration to keep in mind when constructing hypothesis.. 1. Walter F. Blood. Director of Product Management . Agenda. 2. Variables – A Quick Review. Variables in Reports. Variables in Procedures. Variables in Masters. A Quick Review. 3. The Basics. 4. Two types of Variable. • State-space representation.. • Linear state-space equations.. • Nonlinear state-space equations.. • Linearization of state-space equations.. 2. Input-output Description. The description is valid for. Well defined. Testable. Measurable. Controllable. Reasonable and consistent with existing bodies of knowledge. Consider These Questions. Are serial killers evil by nature?. What is the cause of AIDS?. (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.. Chapter 7. Variables and the Structure of Research. Variables and Hypotheses. In social science, we use variables to describe the different characteristics of individuals, groups, organizations and social phenomena. . 5th - 9th December 2011, Rome. A hypothesis. Is the prevalence within each food consumption group significantly different between male-headed and female-headed households?. Both variables are categorical… . In . statistics. , a . Type I error.  is a false positive conclusion, while a . Type II error.  is a false negative conclusion.. The probability of making a Type I error is the significance level, or alpha (α), while the probability of making a Type II error is beta (β). These risks can be minimized through careful planning in your study design..