How to calculate Chi-square statistic

Dear Support,

I am fitting a distribution to data and trying to perform chi-square goodness-of-fit test.

I have calculated the likelihood values and wanted to perform goodness-of-fit test

However, having read through the Help menus, I tried to run the script below but am getting error:

x=claims; [h,p,stats] = chi2gof(X,'cdf','weibull',nparams,2)

where claims is 1xn vector

I do not know where I have gone wrong and would appreciate anyone's assistance to resolve this.

Also, I needed the script to calculate chi-square test statistic for Negative Binomial distribution.

Much thanks in advance

[the cyclist]

What's the complete error message you are getting?

Answer 1

[Tom Lane]

I believe you got an answer separately on comp.soft-sys.matlab, but:

• replace 'weibull' by @wblcdf (not in quotes)
• replace nparams by 'nparams' (in quotes)

Try @nbincdf to use the negative binomial cdf.