Which term indicates the precision of a measurement, often expressed as a range around a statistic?

Which term indicates the precision of a measurement, often expressed as a range around a statistic?

• A. Confidence Limits (Intervals)
• B. Interquartile Range
• C. Variance
• D. Range

Answer: (A)

Precision of a measurement is captured by a confidence interval, which gives a range around a statistic within which the true value is likely to lie with a specified probability (for example, 95%). A narrower interval means more precise estimation because there’s less uncertainty about the true parameter, while a wider interval indicates more uncertainty. The interquartile range describes the spread of the observed data itself, not the uncertainty around a parameter estimate. Variance and range describe dispersion in the data, not the precision of an estimated statistic. So the term that indicates precision, often expressed as a range around a statistic, is confidence limits (intervals).

Precision of a measurement is captured by a confidence interval, which gives a range around a statistic within which the true value is likely to lie with a specified probability (for example, 95%). A narrower interval means more precise estimation because there’s less uncertainty about the true parameter, while a wider interval indicates more uncertainty. The interquartile range describes the spread of the observed data itself, not the uncertainty around a parameter estimate. Variance and range describe dispersion in the data, not the precision of an estimated statistic. So the term that indicates precision, often expressed as a range around a statistic, is confidence limits (intervals).