Because it's a good metric, heck it's a nessesary metric.
In case you've forgotten some of stats 101:
I changed the app/models/probe.rb to support add support for standard deviations, not sure if it's the right spot but seemed the best (although the documentation only mentioned averages so I changed that).
I havent tested it to be honest, the method exists in rstats so it should be peachy-fine but nevertheless you've been warned.
Added standard deviation to the self.metrics method in app/models/pro…
…be.rb. Updated docs.
Fixed typo in docs changed in 5f8bb4e