ch. 1 stats

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Author:
mmb65
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33812
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ch. 1 stats
Updated:
2010-09-10 10:17:10
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PSYC
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Definitions from chapter 1
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  1. Statistics
    a set of mathematical procedures for organizing, summarizing, and interpreting information
  2. population
    the set of all individuals of interest in a particular study
  3. sample
    set of individuals selected from a population, usually intended to represent the population in a research study
  4. variable
    characteristic or condition that changes or has different values for different individuals
  5. Data
    measurement or observations
  6. data set
    a collection of measurements or observations
  7. datum
    a single measurement or observation
  8. parameter
    a value that describes at population
  9. statistic
    a value that describes a sample
  10. descriptive statistics
    statistical procedures used to summarize, organize, and simplify data
  11. inferential statistics
    consitsts of techniques that allow us to study samples and then make generalizations about the populations
  12. sampling error
    the amount of error that exists between a sample statistic and the corresponding population parameter
  13. correlational method
    two different variables are observed to determine whether there is a relationship between them
  14. experimental method
    one variable is manipulated what another variable is observed and measured
  15. independent variable
    variable manipulated by the researcher
  16. dependent variable
    variable being observed
  17. control condition
    do not receive the experimental treatment
  18. experimental condition
    receive the experimental treatment
  19. constructs
    internal attributes or characteristics that cannot be directly observed but are useful for describing and explaining behavior
  20. operational definition
    identifies a measurement procedure for measuring an external behavior and uses the resulting measurement of a hypothetical construct
  21. discrete variable
    consists of separate, indivisible categories
  22. continuous variable
    infinite number of possible values that fall between any two observed values
  23. real limits
    are boundaries of the intervals for scores that are represented on a continuous number line
  24. upper real limit
    top interval
  25. lower real limit
    bottom interval
  26. nominal scale
    consists of a set of categories that have different names (labels and categorized observations)
  27. ordinal scale
    consists of a set of categories that are organized in an ordered sequence
  28. interval sale
    consists of ordered categories that are all intervals of exactly the same size
  29. ratio scale
    is an interval scale with the additional feature of an absolute zero point

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