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- DictionaryCon·fi·dence in·ter·val/ˈkänfəd(ə)ns ˈin(t)ərvəl/
noun
- 1. a range of values so defined that there is a specified probability that the value of a parameter lies within it.
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noun
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Range of estimates for an unknown parameter
Informally, in frequentist statistics, a confidence interval (CI) is an interval which is expected to typically contain the parameter being estimated. More specifically, given a confidence level γ {\displaystyle \gamma } (95% and 99% are typical values), a CI is a random interval which contains the parameter being estimated γ {\displaystyle \gamma } % of the time. The confidence level, degree of c... Wikipedia