Statistics Basics
Variables
Experimental Design
100
A set of some observations.
What is a sample?
100
Any observation that can take on different values.
What is Variable?
100
Every participant has an equal chance to be assigned to any group
What is Random Assignment?
200
All possible observations in a study.
What is a population?
200
A variable that can take on a full range of values (including decimals).
What is a Continuous Variable?
200
When looking for an association between two or more variables.
What is Correlation?
300
Numbers that are organized and that summarize information.
What is a descriptive number?
300
A variable that has categories but no rankings.
What is Nominal variable?
300
A variable that systematically varies with the independent variable.
What is within-groups design?
400
Numbers (estimates) that hopefully can be generalized back to the population.
What is an inferential number?
400
A variable with equal-distant values but no true zero.
What is an interval variable?
400
Participant experiences all the levels of the independent variable.
What is confounding variable?
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