Lecture 3 2011 - 1 Introductory Statistics for the Life...

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Unformatted text preview: 1 Introductory Statistics for the Life Sciences Website : http://courses.umass.edu/rese211c / Email: AskStatsTA@resecon.umass.edu- Basic Stats help, questions about solving problems use of Minitab etc questions about solving problems, use of Minitab, etc. [email protected] – Questions for Dan about course administration. Messages from OWL, use: Send Message . Please, turn your cell phone off! Thanks! I. Introduction (Chapter 1) A. Statistics – what does the word mean? B. Two Kinds of Statistics C. Data Collection 1. Census 2 Non random sampling 2. Non-random sampling 3. Statistical Sampling a. Concepts b. Methods c. Problems: Biases and Errors 4. Experiments Bias : Your sample doesn’t represent population. Interviewer/observer bias : Person collecting data injects bias. c. Problems: Biases and Error. Poorly designed questions/surveys. 1. Attitude! 2. Interviewer doesn’t understand response. 2 Non-Response Bias : People who don’t respond – are they different? • Attitudes! • Poor Sampling method: • Bottom line: Selection Bias : You choose a lousy sample....
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This note was uploaded on 12/08/2011 for the course ECON 211 taught by Professor Daniellass during the Spring '11 term at UMass (Amherst).

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Lecture 3 2011 - 1 Introductory Statistics for the Life...

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