Consider the following frequency distribution. 
What proportion of the observations are less than 21?
Definitions:
Unemployment Taxes
Unemployment taxes are taxes paid by employers to fund the unemployment insurance system, providing benefits to workers who have lost their jobs.
FICA-OASDI
Federal Insurance Contributions Act - Old-Age, Survivors, and Disability Insurance; a payroll tax that funds Social Security and Medicare in the United States.
Workers' Compensation
Insurance offering medical benefits and wage replacement to employees who become injured while on the job.
Clerical Support
Administrative assistance typically involving office or paper work.
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