PPT-Lecture-2: Ask question and create hypothesis

Steps of the scientific method The scientific method uses a series of steps to establish facts or create knowledge The overall process is well established but the specifics of each step may change depending on what is being examined and who is performing it . 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.. Nature of Science. Nature of Science . – . Scientific should be . reliable. and always . changing. Science is complex . No step-by-step method will always be the answer to a question. science relies on skills: . MatLab. Lecture 23:. Hypothesis Testing continued; F-Tests. . Lecture 01. . Using . MatLab. Lecture 02 Looking At Data. Lecture 03. . Probability and Measurement Error. . Lecture 04 Multivariate Distributions. The social science inquiry model consists of 5. stages:. Identify a problem or research question. Develop a hypothesis. Gather data. Analyze data. Draw conclusions. Identifying a Problem or Research Question. 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. Definitions. 1. Hypothesis. : . A tentative statement such as ‘if A happens then B must happen’ that can be tested . by direct . experiment or observation. A proven hypothesis can be expressed as a law or a theory. . How does a hypothesis begin?. What do you do with it?. How do you make one?. How does a hypothesis begin?. Scientists make lots of observations. This leads them to form scientific questions about what they have observed. Each scientist creates an explanation – or hypothesis – that he or she thinks will answer the question.. The Hypothetico-Deductive Model of Scientific Research. 11. Prediction. 10. Theory (Consists of confirmed hypotheses). 9. Confirmed?. 6. Test Hypothesis. 5. Data Analysis. 4. Systematic Observation . 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.. 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. . 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, .