EN
Let U₀ be a random vector taking its values in a measurable space and having an unknown distribution P and let U₁,...,Uₙ and $V₁,...,V_{m}$ be independent, simple random samples from P of size n and m, respectively. Further, let $z₁,..., z_{k}$ be real-valued functions defined on the same space. Assuming that only the first sample is observed, we find a minimax predictor d⁰(n,U₁,...,Uₙ) of the vector $Y^{m} = ∑_{j=1}^{m} (z₁(V_{j}),..., z_{k}(V_{j}))^{T}$ with respect to a quadratic errors loss function.