I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).
What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?
This looks good. Gaussian on a cluster:
How do I do this?