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About 1 out of every _____ black Americans is poor.
Mean Cholesterol Level
The average amount of cholesterol present in the blood, calculated by summing all cholesterol levels and dividing by the number of observations.
Random Sample
A smaller group selected from a broader group, ensuring each person has the same probability of selection.
Confidence Interval
With a certain probability, a specified interval in statistics presumed to include the actual value of a parameter from a population whose characteristics are not known.
Regular Unleaded Gasoline
A type of gasoline without lead additives, used in motor vehicles, that meets specific octane and emissions standards.
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