I have a data set of number of counts vs position where counts were detected. I want to find the noise in the sample. Am I right to think that by 'noise' the requestor wants to know the standard error (SE = stdev/sqrt(N)) where N is the sum of x-axis points.(adsbygoogle = window.adsbygoogle || []).push({});

Also if the above it true then is the SE calculated over the whole length of the data. The data acquired has almost zero (noisy) counts along the first half of the line profile (as expected) and then the signal kicks in later, so should SE be calculated separately on the noisy signal at the start and the real signal near the end or should SE be calculated over the whole data.

Thanks in advance

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# I Calculating noise in a data sample - what region to use

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