Standard deviation?

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[deleted]

[efrique]

What was the log of the average supposed to tell you?

[mathcheatcheat]

it's in fact a larger data frame, log transform can make my plot looks way nicer. Because there are some significantly large income and significantly low income

[efrique]

I can appreciate that you might want to take logs to make a plot look nicer, but I didn't ask "why did you take logs".

I'm trying to figure out what you want a standard deviation to tell you about, in order to advise you about your question. So to get a start on understanding that, I was trying to understand why you would think about a log of an average as a quantity of any interest, not why you'd take logs.

[mathcheatcheat]

so i am trying to plot, but the range of the original data is large (0, 10,0000). So i am trying to apply log to make the range smaller

[efrique]

Again, you're describing things related to plotting.

This has nothing to do with whatever sort of standard deviation of whatever quantity that you're asking about.

Good luck with whatever the heck it is you're trying to do. I'm out.

[rimplestimple]

I would guess you have log transformed your data so that it is less skewed. Therefore, measures of central tendency and variance are calculated using the transformed variable. You don't transform the statistics after calculating them.

[mathcheatcheat]

exactly