In Order to Inexpensively Determine the Contamination Level of a Sample

question 23

Multiple Choice

In order to inexpensively determine the contamination level of a sample of water, a new test is known to yield almost exactly the same value when repeatedly used on samples from the same container of water. However, these individual values are not close to the true average contamination level for the large container. The concern with using this new, cheaper test to determine the contamination level for a single sample of water is that this measurement method is not:

• A) unbiased.
• B) random.
• C) valid.
• D) reliable.
• E) variable.

---

Definitions:

Liberty

The condition in society where one faces no oppressive limitations from authorities on their lifestyle, conduct, or political stances.

Latin American Nations

Countries in the Americas where Romance languages (predominantly Spanish and Portuguese) are spoken, sharing related cultures and historical ties.

Indians

Term historically used to refer to the indigenous peoples of the Americas; now considered outdated and replaced with "Native Americans" or "American Indians."

Free Blacks

African Americans who were not enslaved before the abolition of slavery, living in both the Northern and Southern United States.