I would like to ask how I can reduce uncertainty by designing an experiment.
I need to measure a quantity( say speed, in m/s). I have to calibrate the device and then move the device to measure this.
I would like to reduce the uncertainty by using two devices to measure the same quantity.
If I calibrate the devices together, I will be able to find how correlated they are to each other.
I then can move both devices to measure the same point - how do I combine the uncertainties of these devices?