Nominal scale
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Definition
Nominal scale
Although a variable coded using a nominal scale may appear numeric (e.g., gender coded as female=1, male=2), the numbers should be used only as labels, such that addition/subtraction and multiplication/division are not appropriate.

Examples
The following are examples of nominal variables:
 Gender (male, female)
 Handedness (left, right)
 Eye color (brown, blue, green, hazel)
 Online workshop participants' country of origin
Web Resources

Acknowledgements
Portions of this entry were adapted from
 Nominal Scales at Online Statistics Education: An Interactive Multimedia Course of Study. Project Leader: David M. Lane, Rice University. Retrieved 30 January 2012.