even just some error bars would help: http://en.wikipedia.org/wiki/Error_bar http://en.wikipedia.org/wiki/Error_bar They're typically used for confidence inter

even just some error bars would help: http://en.wikipedia.org/wiki/Error_bar http://en.wikipedia.org/wiki/Error_bar They're typically used for confidence intervals or standard error, but you can theoretically use them with any measure of variability as long as you're clear.