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PSYC 210 (23)

Ch 1 and 2 book notes

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Simon Fraser University
PSYC 210
Cathy Mc Farland

PSYC 210: Introduction to Data Analysis in Psychology CHAPTER 1: Introduction Statistics – refers to a set of procedures and rules (p.2) - For reducing large masses of data to manageable proportions and for allowing us to draw conclusions from those data - The outcome of the application of those rules and procedures to samples of data; numercal values summarizing sample data Descriptive Statistics – purpose is merely to describe a set of data (p.5) - E.g. average length in time, amount of change, variability of change, etc Inferential Statistics – hasty generalizations (p.6) - Generalizing from single (or too limited) observations - Inference – conclusion based on logical reasoning - Tool used to estimate parameters of two or more populations, more for the purpose of finding if those parameters are different than for the purpose of determining the actual numerical values of the parameters Population – complete set of events in which you are interested in (p.6) Parameters – numerical values summarizing population data (p.7) - e.g. population averages Sample – set of actual observations; subset of a population (p.7) Random Sample – a sample in which each member of the population has an equal chance of inclusion (p.7) Design Tree – a device for selecting among the available statistical procedures (p.9) - graphical representations of decisions in
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