Term: Confidence Interval (CI) / Confidence Limits (CL)

Glossary Definition

Last Updated: 2011-02-22


The Confidence Interval is an interval, calculated from data, which contains a population parameter, such as the population median or mean, with specified probability. For example, a 95% confidence interval (written as "95% CI") would have a 95% probability of containing the true population value.

The Confidence Limits are the lower and upper boundaries of a confidence interval, or the values that define the range of a confidence interval.

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