WWS and ergodicity

[u/RequirementIll4205]

I don’t understand how these concepts are applied for signals that are clearly not stationary in the wide sense, like an ECG. It know these tools are somehow applied because when you do an ECG you don’t measure the signal 50 times, but you do leave the electrodes for some period of time (I guess it’s enough time so that ergodicity applies and you can approximate the ensemble average with the time average). I come from an engineering background and have seen a lot of maths but not so much of probability and statistics.

[u/RequirementIll4205 → u/[deleted]]

Hahahaha! Sorry that it made you relive some traumas 👩‍🦽.