what is gam nested when is the random factor nested which is an example of a nested random gam is the gam zone random which of the following is a fixed categorical factor and is a random categorical factor? rr is the random categorical factor a fixed factor which additive model does not include the random categorical factor in a gam? what is the difference between zones and categorical factors which type of categorical factor is always nested which type of random factor is nested within a site what kind of additive model includes nested random factor how to include random categorical factor in gam what is zone randomness gam how to include random categorical factor in GAM which is a nested random factor gam what is the gam is the genotype randomly nested? what is nested random effect in r is the gam random what is a random random factor in a model