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Catalan to English translations [PRO] Tech/Engineering 

Catalan term or phrase: treure/extreure interval de confiança  I am not sure how to translate treure/extreure in the following context from specifications for emissions from a cogeneration plant.
Els valors mitjans per hora /dia validats es determinaran a partir dels valors mitjans per hora validats mesurats després de *treure* el valor de l'interval de confiança especificat anteriorment.
or
...a partir dels valors mitjans per hora vàlids mesurats un cop extret el valor de l'interval de confiança ... 
 Jeanne ZangKudoZ activityQuestions: 1556 ( 3 open) ( 43 without valid answers) ( 31 closed without grading) Answers: 134 United States
 Local time: 05:18

 calculate  Explanation: Confidence Interval
A confidence interval gives an estimated range of values which is likely to include an unknown population parameter, the estimated range being calculated from a given set of sample data.
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If independent samples are taken repeatedly from the same population, and a confidence interval calculated for each sample, then a certain percentage ( confidence level) of the intervals will include the unknown population parameter . Confidence intervals are usually calculated so that this percentage is 95%, but we can produce 90%, 99%, 99.9%, confidence intervals for the unknown parameter.
The width of the confidence interval gives us some idea about how uncertain we are about the unknown parameter (see precision). A very wide interval may indicate that more data should be collected before anything very definite can be said about the parameter.
Confidence intervals are more informative than the simple results of hypothesis tests (where we decide 'reject H0' or 'don't reject H0') since they provide a range of plausible values for the unknown parameter.

 Selected response from: Mary Smith Local time: 11:18
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