[armidylano44]

I'm trying to write a lab report and have a question regarding error analysis.

Basically, I took a bunch of measurements in the lab (titrations), and recorded all of my data with uncertainties that I added due to the method of measurement. Every method of measurement has uncertainty associated with it no matter what, right? I recorded all of my buret readings with +- 0.01 mL.

Now I'm going to take an average of the titration results. Automatically, I think to take the standard deviation of each trial's results, but I'm confused because there's already error in the results that I propagated from the initial measurements.

[armidylano44]

Basically, how do you take the standard deviation of a set of measurements which already have error?

[curiouscat]

I think you do it the regular way. The uncertanities don't factor in directly.