[R] Standard deviation and Mean

[jdanielnd]

Well, it depends on what mean and sd do you want to calculate.

If it's the mean of the variation or frequency mean and sd from the showed
variables, you should do:
> mean(variation)
> sd(variation)
> mean(frequency)
> sd(frequency)

However, if you want to calculate the mean of variation, taking into account
the frequency it has, i.e., a weighted mean, then you should do:
> weighted.mean(variation,frequency)

HTH,

Joao Daniel

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