Question: How can I calculate z-value from chi-squre distribution with 2 df?
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gravatar for alioniya
10 months ago by
alioniya0
alioniya0 wrote:

I tested two models and one is nested inside another. Nested model has 2 parameters and the bigger model has 4. I got the ln likelihood of each models. I know how to calculate the P value using twice the difference of ln likelihoods, since twice the difference of ln likelihoods is following chi square distribution with degree of freedom equal to the difference in the number of parameters between the two models.

How can I calculate z-value from chi-squre distribution with 2 df? I need z-values for further meta-analysis using METAL https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2922887/

snp • 200 views
ADD COMMENTlink modified 10 months ago by h.mon29k • written 10 months ago by alioniya0
1

Perhaps this will help to guide you: A: SNP dataset and Z Score

ADD REPLYlink written 10 months ago by Kevin Blighe56k

As I understand, METAL takes p-values as input and uses them to derive a z-score so I am not sure what you're after.

ADD REPLYlink written 10 months ago by Jean-Karim Heriche22k
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