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chapter1 - Chapter 1: Introduction to Statistics PowerPoint...

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Chapter 1: Introduction to Statistics PowerPoint Lecture Slides Essentials of Statistics for the Behavioral Sciences Seventh Edition by Frederick J Gravetter and Larry B. Wallnau
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Chapter 1 Learning Outcomes
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Math Skills Assessment Statistics makes use of basic math skills The Math Skills Assessment in Appendix A allows you to determine whether you need to review any of these skills. The Math Skills Review in Appendix A provides a quick refresher course on those areas. The final Math Skills Assessment checks your learning
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1.1 Statistics, Science and Observations Statistics: short for statistical procedures Uses of Statistics Used to organize and summarize information Used to determine exactly what conclusions are justified based on the results that were obtained Goals of statistical procedures Accurate and meaningful interpretation Provide standardized procedures
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1.2 Populations and Samples Population The set of all the individuals of interest in a particular study Vary in size; often quite large Sample A set of individuals selected from a population Usually intended to represent the population in a research study
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Variables and Data Variable Characteristic or condition that changes or has different values for different individuals Data (plural) Measurements or observations of a variable Data set A collection of measurements or observations . A datum (singular) A single measurement or observation Commonly called a score or raw score
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Figure 1.1 The relationship between a population and a sample.
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Parameters and Statistics Parameter A value, usually a numerical value, that describes a population Derived from measurements of the individuals in the population Statistic A value, usually a numerical value, that describes a sample Derived from measurements of the individuals in the sample
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Descriptive statistics Summarize data Organize data Simplify data Familiar examples Tables Graphs Averages Inferential statistics Study samples to make generalizations about the population
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This note was uploaded on 04/08/2011 for the course PSY 216 taught by Professor Cynthiaingle during the Spring '11 term at KCTCS.

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chapter1 - Chapter 1: Introduction to Statistics PowerPoint...

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