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P value

Hello, I am new to JMP and I would like to understand why JMP does not give a p-value for certain distributions such as a normal distribution of order 2 or 3?

THANKS

Basic Data Analysis and ModelingData Exploration and VisualizationRe: P value

Hi @kowa : Welcome to the community!  I'm not sure what you are asking. Do you mean to ask why there is no Goodness-of-fit Test for the "Normal 2 Mixture Distribution" or "Normal 3 Mixture Distribution" in the Distribution platform?  

Re: P value

Hi @MRB3855 , 

 

yes, that's my question.

Indeed when I have data adjustments that give me a lognormal distribution, I can have the P-value for Goodness-of-fit but jmp does not propose this if I have a normal distribution of order 2.

Re: P value

Hi @kowa : JMP has no GOF test for these mixture models. And there are good reasons for this. See here:

https://community.jmp.com/t5/Discussions/Goodness-of-Fit/td-p/229235

 

For a more complex explanation/discussion/alternative see here:

https://www.sciencedirect.com/science/article/am/pii/S0167947318301142

And here:

https://www.martinmodrak.cz/2018/05/14/identifying-non-identifiability/#:~:text=What%20is%20%E2%80%9Cnon%2Didentifiability%E2%80%9D,probability%20distribution%20of%20observed%20data.