Comparing standard deviations

#1
Hi,

I have data about incomes from two groups and I want to see which group's variance is bigger.

The two groups income is measured in the same currency, so can I simply compare the standard deviation? Or should I use the coefficient of variation?

(The means are different)

Thanks for your help.
 

trinker

ggplot2orBust
#2
You could use the \(F_{max}\) test also I think it's called Hartley. Never used it myself but learned about it in stats 1. It's similar (maybe the same thing) to what an anova does when it compares variances.
 
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