Fit Centroid MVN Small Area Estimation model using aghq.
fck_aghq.RdRandom effects have a multivariate Gaussian distribution with covariance
matrix calculated using centroid_covariance. Kernel hyper-parameters
are fixed.
aghq.fck_aghq.RdRandom effects have a multivariate Gaussian distribution with covariance
matrix calculated using centroid_covariance. Kernel hyper-parameters
are fixed.