Classification of Variables

1
Classification of Variables

• Discrete Numerical Variable
• A variable that produces a response that comes
  from a counting process.

2
Classification of Variables

• Continuous Numerical Variable
• A variable that produces a response that is the
  outcome of a measurement process.

3
Classification of Variables

• Categorical Variables
• Variables that produce responses that belong to
  groups (sometimes called classes) or categories.

4
Measurement Levels

• Nominal and Ordinal Levels of Measurement refer
  to data obtained from categorical questions.
• A nominal scale indicates assignments to groups
  or classes.
• Ordinal data indicate rank ordering of items.