What determines validity for the averaging of test data?
The validity of averaging depends upon the sample and its purpose. (Note: if the sample can be assumed to be homogeneous, i.e., an individual sample preparation designed to be homogeneous.) Using averages can provide more accurate results. For example, in the case of microbiological assays, the USP prefers the use of averages because of the innate variability of the microbiological test system.
