22 February, 2014

3-2-5 analyzing systems: Sampling

If the system you are trying to analyze is not very simple and small, you will find that it is impossible to collect all the data, so you need to take a sample

Sample is: a subsection of a whole that can be representative of that whole the best way possible; so that you don't need to collect the whole data pool

How to select a sample, and how much sample you need to get, etc….. this is a whole other realm of science labelled "Statistics", "Sampling", "Data warehousing"


One last thing, "Confidence Level" is the certainty of how accurately the sample represents the whole system … and "Principle Of Statistics" let you answer this question and other questions of sampling