Without covariates is it presumptuous to make inferences using the overall psi estimate to areas that were not sampled? In my situation, I do not have a large enough sampling size (n=23 sites, 7 surveys) to tease apart covariate data that was taken at each site. Covariate estimates basically come back with 95% CL of 0.1 to 1 for each site.
If each site is considered a random point, can I regard the overall psi estimate as a representation of a larger area? How large of an area?
Sincerely, Brian Gerber