Which term describes the certainty or reliability of data in an investigation?

Which term describes the certainty or reliability of data in an investigation?

• A. Accurate
• B. Valid
• C. Questionable
• D. Reliable

Answer: (B)

Validity is about whether the data actually reflect the phenomenon you’re trying to understand and whether the methods used to collect them are appropriate for answering the question. When data are valid, you can trust that the measurements and the experimental design support the conclusions, with biases minimized and confounding factors controlled. For example, in testing whether a fertilizer affects plant growth, valid data come from measuring growth with properly controlled variables like light, water, and soil, so the observed effect can be attributed to the fertilizer rather than other factors. Reliability and accuracy relate to other ideas: reliability means you’d get similar results if you repeated the measurements, and accuracy means the measurements are close to the true value. Validity focuses on whether the data and methods actually test the intended question, making the conclusions credible.

Validity is about whether the data actually reflect the phenomenon you’re trying to understand and whether the methods used to collect them are appropriate for answering the question. When data are valid, you can trust that the measurements and the experimental design support the conclusions, with biases minimized and confounding factors controlled. For example, in testing whether a fertilizer affects plant growth, valid data come from measuring growth with properly controlled variables like light, water, and soil, so the observed effect can be attributed to the fertilizer rather than other factors. Reliability and accuracy relate to other ideas: reliability means you’d get similar results if you repeated the measurements, and accuracy means the measurements are close to the true value. Validity focuses on whether the data and methods actually test the intended question, making the conclusions credible.