This applet estimates the uncertainty in a function of a measurement using propagation of error, and compares that estimate to an estimate obtained by simulation, for various non-linear functions.
How to use the applet
- Choose a non-linear function by clicking on it in the left pane of the applet.
- Specify the mean and standard distribution of the random variable X by typing them in the right pane of the applet. Note, these cells act like a spreadsheet application; to change an entry, click on it, delete the current value, type a new one, and then press enter.
- The uncertainty in Y is estimated by propagation of error and by simulation from 100,000 samples. Click Regenerate Samples to generate 100,000 new simulated samples and compute a new estimate of the uncertainty in Y.
The applet