Which concept indicates a measurement's precision and is often summarized by a confidence interval?

Which concept indicates a measurement's precision and is often summarized by a confidence interval?

• A. Narrow Confidence Interval
• B. Confidence Limits (Intervals)
• C. Standard Deviation
• D. Range

Answer: (B)

Confidence limits (confidence intervals) quantify how precisely a measurement is known by providing a range in which the true value is expected to lie with a specified probability. A narrower interval indicates greater precision because the true value is confined to a smaller range. Standard deviation describes how spread out individual measurements are around the mean, not the precision of the estimated parameter itself. The range simply reflects the spread between the extreme values and doesn’t convey statistical confidence.

Confidence limits (confidence intervals) quantify how precisely a measurement is known by providing a range in which the true value is expected to lie with a specified probability. A narrower interval indicates greater precision because the true value is confined to a smaller range. Standard deviation describes how spread out individual measurements are around the mean, not the precision of the estimated parameter itself. The range simply reflects the spread between the extreme values and doesn’t convey statistical confidence.