KStest for unimodal and bimodal models

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Thomas PLOCOSTE
Thomas PLOCOSTE 2019-8-4
回答： Jyotsna Talluri 2019-8-7
Hi, i would like to perform a KStest of an unimodal and bimodal models with observed data X.
Please find an example of X in attachement.
The unimodal model is a lognormal distribution defined as:
where
The bimodal model is a lognormal & lognormal PDF defined as:
where
How can i use the KStest for evaluate the goodness of fit of both models with observed data?
Is there a quick way to evaluate this with KS statistic?
T PLOCOSTE

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Jyotsna Talluri
Jyotsna Talluri 2019-8-7
Hi,
Kstest(x) returns a test decision for the null hypothesis that the data in vector x comes from a specified standard normal distribution or it does not come from such a distribution
If the result is one the test rejects the null hypothesis at default significance level(5%)
From your data
Data=ObservedData(:,1);
x=(Data-3.2)/0.44; %specified mean and standard deviation
r=kstest(x) ;
Similarly ,for a bimodal distribution, check the kstest for each distribution seperately
Refer to the link kstest for more information

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