Tim, On Mon, 2013-03-11 at 18:51 +0100, Tim Gruene wrote: > I don't share your opinion about a single measurement translating into > a systematic error. I would call it a poorly designed experiment in > case you were actually iterested in how accurately you determined the > protein concentration. > OK. As I said, this is not about protein concentration, but let's say I only have about 6ul of protein sample, so that I can only have *one* dilution. Would pipetting uncertainty then be considered systematic error or statistical error?
I am afraid this is a matter of unsettled definitions. By the way, it wasn't an opinion, more of an option in interpretation. I can say that whatever is not sampled in a particular experimental setup is systematic error. Or I can say that (as you seem to suggest, and I like this option better) that whenever there is a theoretical possibility of sampling something, it is statistical error even though the particular setup does not allow accounting for it. Ed. -- "Hurry up before we all come back to our senses!" Julian, King of Lemurs