Exercise1.5 Let Y1, ...,Yn N (,a22), where a > 0 isknown(seeExample1.11).Showthat T(Y) =(ni =1Yi,ni =1Y2 i

Exercise1.5 ∗Let Y1, ...,Yn ∼ N (μ,a2μ2), where a > 0 isknown(seeExample1.11).Showthat T(Y) =(Σni

=1Yi,Σni

=1Y2 i ) is aminimalsufficientstatisticfor μ.