We wish to know the average annual income of a construction worker in LA County. To do so, we go to each active construction site and ask 10% of the workforce present their gross annual income in dollars. Some individual answers included $101,000, $100,000, and $133,000. The average in the 10% sampled was $64,816. - Statistic - Sample - Data - Variable - Parameter - Population The value $64,816 10% of the workforce present at each active construction site. The annual income of a single construction worker. All construction workers in LA County. The average annual income of a construction worker in LA county. The values $101,000, $100,000, and $133,000