Cubic reciprocity: Difference between revisions

Revision as of 00:04, 22 January 2014

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:

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

then, the level variable is given by:

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

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+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 [[Normal_distribution|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:
+<math> \log(y) = f(X) + \mathrm{er} </math>
+then, the level variable is given by:
+<math> y = \exp(f(X))\exp(\mathrm{er}). </math>
+[[Category:Regression analysis]]
+{{statistics-stub}}

Cubic reciprocity: Difference between revisions

Revision as of 00:04, 22 January 2014

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