Lower and upper confidence interval

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Term Lower and upper confidence interval
Description Confidence Interval (Two-Sided): an estimated interval from the lower to upper confidence limit of an estimate of a parameter.
Definition Confidence Interval (Two-Sided): an estimated interval from the lower to upper confidence limit of an estimate of a parameter. This interval is expected to include the true value of the parameter with a specified confidence percentage, e.g., 95% of such intervals are expected to include the true values of the estimated parameters.

Confidence Interval (One-Sided ): an interval below the estimated upper confidence limit, or interval above the estimated lower confidence limit, that is expected to include the true value of an estimated parameter with a specified confidence ( percent of the time). Confidence Limit: an estimated value below (or above) which the true value of an estimated parameter is expected to lie for a specified percentage of such estimated limits.

References 1. IPCS.  Environmental Health Criteria 228. Principles And Methods For The Assessment of Risk From Essential Trace Elements. WHO, Geneva, 2002

2.   http://www.inchem.org/documents/ehc/ehc/ehc228.htm

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