Character variables

• Nominal: No order (e.g. Apple, Pear, Banana)
• Ordinal: Has an order (e.g. Low, Medium, High)

Numeric variables

• Interval: Distance between values is equally spaced (e.g. 1, 2, 3)
• Percent: Interval variable with a fixed range of 0-100 or 0.0-1.0
• Log: Variable with a non-linear scale (e.g. 1,10,100)