Variables Flashcards
How are variables characterised?
They are based on two things:
1. The nature of the variable
2. The role of the variable
How are the roles of the variable characterised?
- Independent Variable
- Dependent Variable
How is the nature of the variable characterised?
- Qualitative
- Quantitative
How is qualitative characterised?
- Nominal
- Ordinal
How is Quantitative characterised?
State the reason for the separation of quantitative and qualitative variables.
Different uses or methods
Qualitative Variables
Names
Nominal (Categorical)
no order
Nominal example
gender, hair colour
Ordinal
Clear order, order matters not the difference between values
Ordinal example
Pain score(1,2,3,4..8)
Quantitative variable
Numeric
Interval
Does not have a true zero (Numerical values without a true zero point).
0 does not indicate a complete lack of the quantity being measured.
Interval example
temperature (0 degrees)
Ratio
same as an interval but HAS AN ABSOLUTE ZERO
