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Difference between revisions of "Confidence interval"

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(Eugen Grebenik et al., first edition 1958)
(Eugen Grebenik et al., first edition 1958)
 
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<noinclude>
 
<noinclude>
[[en-I:confidence interval]] [[ar-I:فترة ثقة (ثقة)]] [[cs-I:interval spolehlivosti]] [[de-I:Vertrauensbereich]] [[es-I:intervalo de confianza]] [[fi-I:varmuusväli]] [[fr-I:intervalle de confiance]] [[it-I:intervallo di confidenza]] [[pl-I:przedział ufności]] [[pt-I:INTERVALO de confiança]] [[ru-I:Границы доверительные]]  
+
[[en-I:confidence interval]] [[ar-I:فترة ثقة]] [[cs-I:interval spolehlivosti]] [[de-I:Vertrauensbereich]] [[es-I:intervalo de confianza]] [[fi-I:varmuusväli]] [[fr-I:intervalle de confiance]] [[it-I:intervallo di confidenza]] [[pl-I:przedział ufności]] [[pt-I:INTERVALO de confiança]] [[ru-I:Границы доверительные]]  
 
</noinclude>
 
</noinclude>
 
{{DEFAULTSORT:Confidence interval}}
 
{{DEFAULTSORT:Confidence interval}}

Latest revision as of 07:25, 11 February 2010

Confidence interval  (CONFIDENCE interval)


A population parameter1 is a numerical value that characterizes a population. Statistical estimation2 is the name given to the procedure by which the values of such parameters can be estimated from the sample. Such estimates are subject to sampling errors3 and a measure of the magnitude of the sampling error is generally given by the standard error4. Sometimes a confidence interval5 is associated with an estimate to show the limits within which the estimated quantity may be expected to lie. A difference between two values is called a significant difference6 when the probability that it is due to chance is less than a given value which is called the level of significance7. Thus a difference will be significant at the 5 per cent level if the probability that it could have arisen by chance is less than 0.05.


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