PPT-CoAg Sampling & Sample Preparation Working Group:

YR04 Efforts MFRPA Alliance and Lab Accreditation Meeting Louisville KY February 2 2016 Overview of S ampling Working Group Efforts Publication of the Guidance on Obtaining Defensible Samples . Population = group of people you need to know information about. Census = information obtained from every person in population. Sample = small group from within the population. Sample survey = investigation done using a sample. Supplement 10. Copyright © 2015 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education.. You should be able to:. LO . 10S.1. Impact Evaluations. Marie-H. é. lène. . Cloutier. 1. Introduction. Ideally, want to compare what happens to the . same. schools with and without the program. But . impossible. → use . statistics. Big Question: How do you know when you have collected enough data and done it appropriately?. Today’s Agenda. Tips and Tricks. Article Review Discussion. Assignment for Feb 24. Sampling Review. Observation Approaches (Qualitative/ Quantitative) and Practice. It is important that the sample selected be representative of the population from which it is taken so that inferences about the population are the best that they can be.. Probability Sampling Methods. Choosing your participants for your research.. Sample. The group of participants that make up your research. Samples are supposed to represent the . population . that you are researching but the way you choose to find your sample is dependent on many factors.. Stats Day 2014. Jason Ellwood. Otumoetai. College. Today... A look through, and go at, . some. . activities designed to give students visual and conceptual . appreciation . of what sampling variation is and how it impacts on statistical investigation in 91264. BPT2423 – STATISTICAL PROCESS CONTROL. CHAPTER OUTLINE. Fundamental Concepts. Types of Sampling Plans. Single, Double, Multiple and Sequential. Statistical . Aspects. Lot-By-Lot . Acceptance Sampling Plans for Attributes. How do Sociologists choose the participants for their research?. Starter. Think. - Work independently for 2 minutes to write in as many key concepts into the worksheet as you can. . Pair. - Now, work in a pair with the person sitting next to you for 2 minutes and help each other with any key concepts you couldn't do on your own.. Parameter & Statistic. Parameter. Summary measure about population. Sample Statistic. Summary measure about sample. P. . in. . P. opulation. . &. . P. arameter. S. . in. . S. ample. . How . can it be that mathematics, being after all a product of human thought independent of experience, is so admirably adapted to the objects . of reality. Albert Einstein. Some parts of these slides were prepared based on . General Sampling Issues. Thinking of the steps in sampling (from theoretical population to respondents)—what are some biases that can come in at each point?. What is the proximity similarity model? What are issues with that model?. How . can it be that mathematics, being after all a product of human thought independent of experience, is so admirably adapted to the objects . of reality. Albert Einstein. Some parts of these slides were prepared based on . 7. Introduction. In . a typical statistical inference problem, you want to discover one or more characteristics of a given population. .. However, it is generally difficult or even impossible to contact each member of the population..