Essay
Each month the Bureau of Labor Statistics reports the number of people (in thousands)employed in the United States by age.The accompanying frequency distribution shows the results for August 2011. 
a.Construct a relative frequency distribution.What proportion of workers is between 20 and 24 years old?
b.Construct a cumulative relative frequency distribution.What proportion of workers is younger than 35 years old?
c.Construct a relative frequency histogram.
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