Resolution:
## Figure 1.
Structure of a hierarchical model. The replicates j of the generic subject i are normally distributed around a mean value μ_{i }with a within sample variance σ^{2}, i.e. x_{ij}~N(μ_{i}, σ^{2}). The mean values μ_{i }are normally distributed around a "population" mean value M with between sample variance τ^{2}, i.e. μ_{i}~N(M, τ^{2}).
Demichelis |