
Hello, everybody,
There is the first time for me to post a question, because I really cannot
find answer from books, websites or my colleagues. Thank you in advance for
your help!
I am running likelihood ratio test to find if the simpler model is not
significant from more complicated model. However, when I run LRT to compare
them, the test did not return F value and p-value for me. What's the reason?
How can I get such important information?

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Analysis of Deviance Table

Model 1: sum_surv15 ~ s(FLBS) + s(byear) + s(FLBS, byear)
Model 2: sum_surv15 ~ s(FLBS) + SES + s(byear) + s(FLBS, byear)
   Resid. Df Resid. Dev         Df Deviance F Pr(>F)
1 1202.21094     601.27                             
2 1201.43848     601.29    0.77246    -0.02
####################################################
Thank you very much!

Jianghua Liu, University of Sheffield
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