Changes

==Precision==  

==Precision==  

Precision can be described as the 'repeatability' of the result of a study, and in the case of descriptive studies is closely associated with the confidence interval. The precision is therefore a measure of the random error in a sample.

The '''precision''' of an estimate is a measure of the 'repeatability' of this estimate if the same study was conducted again. Therefore, it is a measure of the random error inherent in a sample, which in the case of descriptive studies is closely associated with the '''confidence interval'''.  

==Confidence intervals==

==Confidence intervals==