# ch. 1 stats

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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
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
 Author: mmb65 ID: 33812 Card Set: ch. 1 stats Updated: 2010-09-10 14:17:10 Tags: PSYC Folders: Description: Definitions from chapter 1 Show Answers: