Cubic reciprocity

The Smearing retransformation is used in regression analysis, after estimating the logarithm of a variable. Estimating the logarithm of a variable instead of the variable itself is a common technique to more closely approximate normality. In order to retransform the variable back to level from log, the Smearing retransformation is used.

If the log-transformed variable y is estimated as:

$\log (y)=f(X)+\mathrm{e}\mathrm{r}$

then, the level variable is given by:

$y=\exp (f(X))\exp (\mathrm{e}\mathrm{r}).$ I am Chester from Den Haag. I am learning to play the Cello. Other hobbies are Running.

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