Re: [ai-geostats] back transformation

[Isobel Clark]

What back-transform would you use for (1)? I use Sichel's theory, which produces prediction intervals for the lognormal back transform. Download any one of my lognormal kriging papers from http://uk.geocities.com/drisobelclark/resume (late 1990s, various audiences).

 

Isobel

Recep kantarci <[EMAIL PROTECTED]> wrote:

Dear list members

 

When studied on a log-transformed variable and intended to construct prediction intervals, which option should be followed? Why?

 

1) construct prediction interval first, back-transform later.

 

OR

 

2) back-transform first, construct prediction interval later.

 

Thanks in advance

Recep

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