A cell phone company wants to determine if the use of text messaging is independent of age. The following data has been collected from a random sample of customers. 
To conduct a contingency analysis, the number of degrees of freedom is:
Definitions:
Maturity Curve
A maturity curve is a schedule specifying the amount of annual increase a person will receive.
Job Responsibilities
The specific tasks, duties, and functions an employee is expected to perform in their role within an organization.
Geographic Area
A specified region or space defined for purposes of geography, demography, or jurisdiction.
Occupational Group
A category of jobs that involve similar tasks, require similar skills, and are often found within the same industry or sector.
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