PPT-Data first vs Hypothesis first

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. +. 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 . 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.. Dr. Anshul Singh Thapa. There are number of consideration to keep in mind when constructing 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. Ellen, . M. egan, Dan. Riemann Hypothesis. The nontrivial Riemann zeta function zeros, that is, the values of s other than -2,-4,-6….. . s. uch that . δ. (s)=0 all lie on the critical line . Θ. = R[s] = ½ (with real part ½). 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 difference between a sample and a population. Null and research hypotheses. What is a good hypothesis. This week. 2. Hypothesis. An educated guess. Research questions .  hypothesis. A good hypothesis translates a problem or research question into a form that is more amendable to testing. 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?. Hypothesis Testing. A statement has been made. We must decide whether to . b. elieve it (or not). Our belief decision must ultimately stand on three legs:. What does our general background knowledge and experience tell us (for example, what is the reputation of the speaker)?. 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. . Sample. , shape, location, and spread. Sample = make sure it's random, handle missing data (mcar, mar, nmar), imputation . methods. NMAR!. . Shape = Is the data skewed, normal, or flat? If normal then we can use statistical analysis for normal . 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