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Unformatted text preview: (or interval estimate ) is a range (or an interval) of values used to estimate the true value of a population parameter. A confidence interval is sometimes abbreviated as CIa confidence level is the probability 1[alpha] (often expressed as a percent) that is the proportion of times that the confidence interval actually does contain the population parameter (also called the degree of confidence , or the confidence coefficient )most common choices are 90%, 95%, or 99%a critical value is the number on the borderline separating sample statistics that are likely to occur from those that are unlikely to occur...
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 Fall '08
 Sapko
 Statistics, Inferential Statistics

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