PPT-Confidence Intervals, Effect Size and Power

Chapter 8 Hyde Fennema amp Lamon 1990 Mean gender differences in mathematical reasoning were very small When extreme tails of the distributions were removed differences were smaller and reversed direction favored girls. Remember we saw The sample proportion will differ from the population proportion by more than the margin of error less than 5 of the time The Margin of Error for a sample of size n is 1 n Suppose we wanted to estimate a Population Mean rather than a Module 2.2: Confidence Intervals for Two Parameters Lecture 2.2.4: Confidence Intervals as Hypothesis Tests The foregoing section shows that the computaprovide computational procedures forces of means ESSM 689. 2015. Meta-analysis. “If . only we knew what we . know…”. -Caria O’ Dell . and Jack Grayson. “. A. nything . you can do, I can . do meta“. “Meta-Analysis. , . Shmeta. -Analysis. Excel. GrowingKnowing.com © 2011. 1. GrowingKnowing.com © 2011. Estimates. We are often asked to predict the future!. When will you complete your team project?. When will you make your first million dollars?. . Results and Discussion. Results Section. Start on first line after the last line of the Methods section. No hard page break.. Type “. Results. ” on that first line. . Center it.. Include tables and/or figures when appropriate.. GrowingKnowing.com © 2011. 1. GrowingKnowing.com © 2011. Estimates. We are often asked to predict the future!. When will you complete your team project?. When will you make your first million dollars?. Section 8.1. Confidence Intervals: The Basics. After this section, you should be able to…. INTERPRET a confidence level. INTERPRET a confidence interval in context. DESCRIBE how a confidence interval gives a range of plausible values for the parameter. Office of Methodological & Data Sciences. November . 13, 2015. Sarah Schwartz. www.cehs.usu.edu/research/omds. Quantitative Research. Research Question. Clear, focused & concise question that drives the study. Chapter 6 Confidence Intervals Sections 6-1 and 6-2 Confidence Intervals for Large and Small Samples   VOCABULARY: Point Estimate – A single value estimate for a population parameter. Confidence Intervals for a Population Proportion Section 8.3 Objectives Construct a confidence interval for a population proportion Find the sample size necessary to obtain a confidence interval of a given width Hao. . Zhou & David . Dueber. February 6, 2017. Applied Psychometric Strategies Lab. Applied Quantitative and Psychometric Series. Outline. Fake real life research scenario. Significance testing and statistical errors. An Overview. Statistical Significance. Only tells you sample results unlikely were the null true.. Null is usually that the effect size is absolutely zero.. If power is high, the size of a significant effect could be trivial.. ‘statistically significant’ does not mean ‘important’ . IQ’s of UW undergraduates. Suppose we measured the IQ’s of 10,000 UW undergraduates and found a mean IQ of 100.3. If we were to conduct a one-tailed z-test to determine if this mean is . Special Topics. A 95% Confidence Interval. Now, in plain English…. What this is saying is that a 95% confidence interval is an interval created to estimate what (where) the true parameter might be..