Johnson's Transformation Distribution Model

S

SteveT

#1
Capability Calculations - Unilateral Tolerance Distributions - Johnson's Transformation Distribution Model (JTDM)has been used to perform best fit analysis on raw data to establish CR, Skewness , Kurtosis etc. Reason: Normal curve not applicable for characteristsics such as Surface Finish, where negatives cannot exist. Can some one out there define JTDM and how it can be used. Thankyou....Steve
 
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R

Rick Goodson

#2
Steve,

I am not familair with the Johnson Transformation Model, and apparently neither is anyone else looking at this thread. Where did you read about this transformation?
 

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#3
If you would like a copy of the distribution density funtion f(x) and the transformed standardized normal vairate z (at a given level of alpha), e-mail me at [email protected] These formulas were published by Hahn & Shapiro; Johnson, 1983 based on the work of N.L. Johnson, 1949.

I've got the formulas in a Word document.

[This message has been edited by Zeno (edited 25 June 2001).]

[This message has been edited by Zeno (edited 25 June 2001).]
 
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