Lecture+1+SU10+_core+concepts+and+terms_-1

Lecture+1+SU10+_core+concepts+and+terms_-1 - Sociology 210...

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02/23/11 Soc 210 Summer 2010 1 Sociology 210 Lecture 2: What is Statistics? Core Concepts and Terms
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02/23/11 Soc 210 Summer 2010 2 Introduction to Statistical Research “Statistics” is a body of methods for collecting and analyzing data Considerations when using statistical methods Design: How to acquire and analyze required data Description: Summarizing and exploring data Inference: Estimating characteristics of population from sample Causal inference
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02/23/11 Soc 210 Summer 2010 3 Populations vs. Samples Population : The total set of subjects of interest in a study (e.g., persons, objects, or events) A numerical summary of a population is called a parameter Sample : a subset of the population A numerical summary of a sample is called a statistic Much of this course is about what conclusions we can draw about a population based on a sample from a population Simple random sample makes this a more tractable problem Definition of Simple Random Sample: One in which every member of the population has equal chance of being selected for the sample We will always assume we have a simple random sample
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02/23/11 Soc 210 Summer 2010 4 Figure 1-1: The relationship between a population and a sample.
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02/23/11 Soc 210 Summer 2010 5 Bad Statistics Joke of the Day
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Lecture+1+SU10+_core+concepts+and+terms_-1 - Sociology 210...

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