Types of Variables
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types of variables
Types of Variables
- What are the variables collected by the survey you just took?
- What are their types?
Types of Variables
- personality: categorical
- eye_color: categorical
- siblings: numeric, discrete
- sleep_hours: numeric, continuous
- sleep_time: categorical, ordinal
- rating: categorical, ordinal or numeric, discrete
Checking understanding
Sign up for gradescope (it’s free) and enter our course page (Entry Code: 6JBP27)
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Take the Types of Variables quiz
Association vs. causation
- Association: when two variables show some connection (like correlation) with one another
- Association does not imply causation
- Causation can only be inferred from a randomized experiment
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Explanatory and response variables
- Response variables are also known as dependent variables
- Explanatory variables are also known as independent variables
- A response variable is the variable that is measured and is expected to change based on the manipulation of other variables (the explanatory variables)
- The explanatory variables are expected to affect the response variable
