Categorical Variable/Examples/Time to Failure

Example of Categorical Variable

Let $X$ be a random variable whose values take on various classifications of time to failure of a machine part:

$\set {< 100 \, \mathrm {hr}, 100 - 199 \, \mathrm {hr}, 200 - 299 \, \mathrm {hr}, > 300 \, \mathrm {hr} }$

Then $X$ is classed as a categorical variable.

Sources

• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): categorical variable