18.· (i) In the preceding problem determine the maximin test if to' is replaced by r.a i~

d, where the a's are given positive constants. (ii) Solve part (i) with Var(X;) = 1 replaced by Var(X;) = al (known). [(i): Determine the point (~r ,...,~:) in w' for which the MP test of H against K: (~r, ... has the smallest power, and show that the MP test of H against K is a maximin solution.]