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standard log transformation

Polish translation: standardowa transformacja logarytmiczna

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:standard log transformation
Polish translation:standardowa transformacja logarytmiczna
Entered by: Opuncja
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08:48 Jul 9, 2008
English to Polish translations [PRO]
Medical - Medical (general) / standard log transformation
English term or phrase: standard log transformation
Therefore, standard nonparametric tests (problem of ties) or standard log transformation were not appropriate.....Dlatego standardowe badania nieparametryczne lub standardowe transformacje logarytmiczne były niewłaściwe?
Proszę o pomoc w tłumaczeniu, Aleksandra
Opuncja
Local time: 12:53
standardowa transformacja logarytmiczna
Explanation:
Medical Statistics at a Glance
Authr: Aviva Petrie, Caroline Sabin

Rozdział 9
Transformatinos

Why transformations?

The observation in our investigation may not comply with the requirements of the intended statistical analysis (Chapter 35).
• A variable may not by normally distributed, a distributional requirement may for many different analyses.
• The spread of the observations in each of a number of groups may be different (constant variance is an assumption about a parameter in the comparison of means using the unpaired t-test and analysis of variance - Chapters 21-22).
• Two variables may not be linearly related (linearity is an assumption in many regression analyses - Chapters 27--33 and 42).

It is often helpful to transform our date to satisfy the assumptions underlying the proposed statistical techniques.

How do we transform?
We convert our raw data into transformed data by taking the same mathematical transformation of each observation. Suppose we have n observations (Y1, Y2, …, Yn) on a variable, Y, and we decide that the log transformation is suitable. We take the log of each observation to produce (logY1, logY2,…, logYn). If we call the transformed data may be written (Z1, Z2,…, Zn).

We check that the transformation has achieved its purpose of producing a data set that satisfies the assumptions of the transformed data. See Chapter 35, and proceed to analyse the transformed data (Z1, Z2,…, Zn).

In medicine, the log transformation is frequently used because of its logical interpretation and because many variables have right-skewed distributions.

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Note added at 6 hrs (2008-07-09 15:18:13 GMT)
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Przpraszam za błędy w przepisywaniu. Powinno być
Trasformations zamiast Transformatinos;
be zamiast by w 'may not by normally distributed'
Selected response from:

DarekS
Local time: 12:53
Grading comment
4 KudoZ points were awarded for this answer

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Summary of answers provided
3standardowa transformacja logarytmiczna
DarekS


  

Answers


6 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5
standardowa transformacja logarytmiczna


Explanation:
Medical Statistics at a Glance
Authr: Aviva Petrie, Caroline Sabin

Rozdział 9
Transformatinos

Why transformations?

The observation in our investigation may not comply with the requirements of the intended statistical analysis (Chapter 35).
• A variable may not by normally distributed, a distributional requirement may for many different analyses.
• The spread of the observations in each of a number of groups may be different (constant variance is an assumption about a parameter in the comparison of means using the unpaired t-test and analysis of variance - Chapters 21-22).
• Two variables may not be linearly related (linearity is an assumption in many regression analyses - Chapters 27--33 and 42).

It is often helpful to transform our date to satisfy the assumptions underlying the proposed statistical techniques.

How do we transform?
We convert our raw data into transformed data by taking the same mathematical transformation of each observation. Suppose we have n observations (Y1, Y2, …, Yn) on a variable, Y, and we decide that the log transformation is suitable. We take the log of each observation to produce (logY1, logY2,…, logYn). If we call the transformed data may be written (Z1, Z2,…, Zn).

We check that the transformation has achieved its purpose of producing a data set that satisfies the assumptions of the transformed data. See Chapter 35, and proceed to analyse the transformed data (Z1, Z2,…, Zn).

In medicine, the log transformation is frequently used because of its logical interpretation and because many variables have right-skewed distributions.

--------------------------------------------------
Note added at 6 hrs (2008-07-09 15:18:13 GMT)
--------------------------------------------------

Przpraszam za błędy w przepisywaniu. Powinno być
Trasformations zamiast Transformatinos;
be zamiast by w 'may not by normally distributed'

DarekS
Local time: 12:53
Native speaker of: Polish
PRO pts in category: 70
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