What is a key characteristic of a hypothesis in research?

A key characteristic of a hypothesis in research is that it can be empirically tested. A hypothesis serves as a specific, testable prediction derived from a theory or existing knowledge. This allows researchers to conduct experiments or observations to gather data that will either support or refute the hypothesis.

Empirical testing is crucial because it enables researchers to determine whether there is evidence to back up their claims or assertions. This aspect of a hypothesis is essential for scientific inquiry, as it not only facilitates validation of theories but also contributes to the advancement of knowledge through repeatable and observable phenomena.

In contrast, the other characteristics mentioned do not accurately define a hypothesis. For example, saying a hypothesis must always be true contradicts the essence of scientific testing, which is built on the premise that hypotheses can be proven false. Likewise, while a hypothesis might be related to measurable outcomes, being measurable is not inherently tied to the definition of a hypothesis. It's possible to formulate hypotheses that do not articulate measurable outcomes effectively. Lastly, a hypothesis is fundamentally built on the premise that it requires data for testing; therefore, the assertion that it does not require data conflicts with its role in the research process.