PPT-Sampling Polling, and estimating proportions

Choosing a sample size Sampling methods Stratified sampling cluster sampling Sampling problems Nonresponse bias measurement bias Optimization Exce l s Solver Adverse selection. PRACTICAL APPLICATIONS IN . eDISCOVERY. WELCOME. Thank you for joining. Numerous diverse attendees. Today’s topic and presenters. Question submission for later response. You will receive slides, recording and survey tomorrow . In this section we will be able to give real life examples of Fractions and Proportions. We will also learn how to solve and evaluate Fractions and Proportions in word problems.. Lesson plan goals. We are constantly using fractions everyday. Most of the time not really even noticing that we are using fractions. Have you ever checked the clock or a watch for the time? Guess what the time is a fraction of a day so any time you use a watch, clock. A. Gallup Poll. I. Polling. A. Gallup Poll. B. Random sampling. I. Polling. A. Gallup Poll. B. Random sampling. C. Random-digit dialing. I. Polling. A. Gallup Poll. B. Random sampling. C. Random-digit dialing. Wei Ye, Fabio Silva. John . Heidemann. Present By: Eric Wang. Outline. Introduction. Design of SCP-MAC. Lower Bound of Energy Performance with Periodic Traffic. Protocol Implementation. Experimental Evaluation. (. Wei Ye, Fabio . Sliva. , and John . Heidemann. ). Advanced Computer Networks. ECE537-2014 Fall. Presented by . Tianyang. Wang. Dec.2, 2014. Outline. Introduction. Design. . of. . SCP-MAC. Performance. Statistics. What you will learn. Be able to state the null and alternative hypotheses for testing the difference between two population proportions.. Know how to examine your data for violations of conditions that would make inference about the difference between the two population proportions unwise or invalid.. 1. REEF Polling is a real-time, . in-class, . student response system. You can use REEF polling through either mobile devices or traditional . iClickers. .. 2. You can choose to use your previously-purchased . surprised when the . polls are wrong?. Professor Patrick Sturgis, University of Southampton. Swedish Statistical Society Annual Conference. 23 March 2017, Lund. What I’ll talk about. Why we shouldn’t be surprised:. two-proportion inference tests. Chapter 22. Proportions observed in independent random samples . are. independent. Thus, we can add their variances. So…. The standard deviation of the difference between two sample proportions is . Difference Between Proportions. Sometimes we want to see if there is a significant difference between independent groups.. Control group vs. treatment group or placebo group. Men vs. women. Last year vs. this year. and Estimators. EXAMPLE . Because of rude sales personnel, a poor business plan, ineffective advertising, and a poor name, Polly Esther’s Fashions was in business only three days. On the first day 1 dress was sold, 2 were sold on the second day, and only 5 were sold on the third day. Because 1, 2, and 5 are the entire population, the mean is . Yawn Seed?. Subject. Yawned?. Yes. No. Total. Yes. 10. 4. 14. No. 24. 12. 36. Total. 34. 16. 50. Trial. Number who yawned in yawn seed group. Number who yawned in no yawn seed group. Difference in proportions (yawn. AP Statistics. Unit 5. The Central Limit Theorem for Sample Proportions. Rather than showing real repeated samples, . imagine. what would happen if we were to actually draw many samples.. Now imagine what would happen if we looked at the sample proportions for these samples. . Whiteboard Features. ZOOM. Julie Horwath. Touro University California . Electronic Resources Librarian. julie.horwath@tu.edu. POLLING. How to create, launch, and share polls.. IMPORTANT!. You can create up to 25 polls for a single meeting.