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Stats Quiz 1

TermDefinition
Independent Variable Systematically manipulated by the researcher in experimental research; the one you manipulate; what the researcher changes
Dependent Variable Outcome of interest; what we design research to assess/measure; what you measure
Control Variable Anything in an experiment that is NOT allowed to vary
Random Variable Anything in an experiment that is allowed to change (in an uncontrolled way)
Confounding Variable Varies systematically with the independent variable
An experiment with few confounding variables is said to have high... internal validity
Internal Validity You don't have confounding variables
Descriptive Stats Describe, summarize, or organize data
Example of Descriptive Stats An average exam score for the class
Inferential Stats Use sample data to infer the nature of a population
Example of Inferential Stats Testing Psy100 students on which form of note-taking leads to better exam scores and then generalize these results for all college students
Population The entire group of scores that a researcher desires to learn about. Consists of every single person or thing that shares a particular characteristic
Example of Population All U.S. college students
Sample A subset of scores from the population
Example of Sample 1,000 college students from a variety of colleges
When the results of a study are more generalizable the results are said to have high... External validity
External validity You can generalize to the larger population
Scales of Measurement NOIR- Nominal, Ordinal, Interval, Ratio
Nominal Group objects into categories; number tells us what group you are a member of
Ordinal Values reflect rank order; number tells us the ranking of something but not the distance between ranks
Interval Numbers reflect actual amounts; The is equal distance between numbers
Ratio Interval scales, but zero point reflects true absence of property; Same as interval but it has an absolute 0 point and you can't go negative
Example of Nominal Political party affiliation: 1= Republican, 2= Democratic, etc
Example of Ordinal Race results
Example of Interval Temperature (in Celsius or Fahrenheit)
Example of Ratio Speed, dollars, weight, temperature (in Kelvin)
Created by: mlamp
 

 



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