# confidence interval

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Related to confidence interval: Confidence level

## confidence interval

[′kän·fə·dəns ‚in·tər·vəl]
(statistics)
An interval which has a specified probability of containing a given parameter or characteristic.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## confidence interval

the range of values round the mean of a SAMPLE within which one can state the PROBABILITY of the observation being correct for the parent population. This is usually expressed in terms of standard deviation units. See also MEASURES OF DISPERSION, CRITERIA AND LEVELS OF MEASUREMENT.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
References in periodicals archive ?
AS MOST READERS know, statistical tests calculate a mean and confidence intervals on the mean.
As a surrogate model Gaussian Process modeling is employed to find approximate solution values together with their confidence intervals. As GP-DEMO works on the same principles as DEMO, the quality of its results is expected to be similar to the results of DEMO, but with fewer exact solution evaluations.
To visualize the construction of confidence intervals, a population of 2000 random numbers is generated, its standard deviation is calculated and is used in all confidence interval estimations.
Researchers can now compute a confidence interval for a squared multiple correlation using a simple R command (see Kelley, 2007).
If the random interval [L(R), U(R)] satisfies P[L(R) [less than or equal to] [theta] [less than or equal to] U(R)] = 1 - [gamma], then [L(r), U(r)] is a confidence interval for [theta] with confidence coefficient 1 - [gamma], where r = ([r.sub.1], ..., [r.sub.n]) and each [r.sub.i] is an observed value of [R.sub.i] when i = 1, 2, ..., n.
For the classification of genotypes treated in this work or the Figure (18) and by the confidence interval, our genotypes are classified into two groups:
In the case of the median, we obtain the confidence interval using five different methods: the standard error method (Kendall, 1945; Mothes and Torres-Ibern, 1970), the binomial median confidence interval (Bland, 2003; DeCoster and Burchill, 2000), the McKean & Schraeder method, the Maritz & Jarret method and the adaptive kernel estimation to obtain the median confidence interval (Wilcox, 2005).
In the study by Smith (2013) in this issue on readmissions in patients with congestive heart failure (CHF), some results were reported with confidence intervals, abbreviated CI.
adapted Bernstein's inequality to provide an improvement over a naive confidence interval. The method requires only independent data with finite variance and imposes a heuristic assumption of boundedness in a range (a, b) [member of] R.
Although there are no assumptions needed to calculate r, there are assumptions regarding testing hypothesis and confidence intervals for r.
Typical epidemiological indicators of the impact of contaminated by bacteria territories on the aei incidence Ust- Taraz Aktau Kamenogorsk city city city Index of CFB group 50.0 28.6 27.7 Indicator (%ooo) 206.2 183.2 138.3 AEI rank number 1 2 3 The significance level 0.05 0.05 0.05 Lower confidence interval 0.18 0.16 0.11 Upper confidence interval 28.77 25.14 22.0 The odds ratio (OR) 1.78 1.64 1.36 Lower confidence interval 0.22 0.20 0.15 Upper confidence interval 3.32 2.84 1.95 Relative risk (RR) 2.22 2.0 1.56 Ecological share 54.9 50.0 37.7 Table 2.
Missouri uses the following steps in evaluating AYP at the school, district/LEA, and state levels: (1) Participation Rate; (2) Cell Size; (3) Annual Proficiency Target Indicator; (4) Additional Indicators; (5) Confidence Interval; (6) Growth; (7) Safe Harbor; and (8) Safe Harbor Confidence Interval.

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