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A ready reckoner to help all performance analysts in their everyday work (03 Sep 15)
Yours for absolutely nothing
When analysis of performance data is used to generalise in any way, it is essential to always calculate a confidence interval (CI) around each statistic.
The CI is a range of values that you can be confident (to a pre-specified level) includes the real value of the statistic for the entire population.
This could be useful if you are analysing repairs data, rent arrears…
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