Sample Data

Sample data is different than total count data because instead of counting every single person or event, a smaller sample is measured and used to make estimates about the larger population.  A good example of this type of data is data from the American Community Survey, which was formerly known as the "long form" of the Census but is now sent out to a small group of people every year.  In the American Community Survey, the Census Bureau randomly selects a smaller number of households in the community each year and uses those households to make estimates about things like the poverty rate and education levels for the whole community.