问答题
A.σ12=σ22=···=σK2B.μ1=μ2=···=μKC.S12=S22=···=SK2D.x12=x22=···=xK2E.π1=π2=···=πK
A.3,3,4B.3,4,3C.3,4,4D.4,4,4E.4,4,5