Hi again (sorry for spamming your inboxes). I realized I probably confused everyone with my last email.
I think I may be understanding this question a bit more...
To clarify, the raw poisson data is a set of just numbers, and the m2, m10, etc are sets of the MEANS of these numbers.
So technically you want a command that gives you just the standard deviations, since for the raw data you want just the standard dev and for the sample means you want the standard deviations of the means (so in this case you will already have the means and will be needing the SD, not the SE).
I think the original confusion is not the difference between standard deviation or standard error, but what command to use when one gives you numbers labeled as standard deviation while another gives you numbers labeled as standard errors (intuitively you'd go with the second one, but not in this case).
Thanks!