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,X, be iid N(μχ, σ*), Yi, ,Yn be iid N(Pv, σ*), and Xs and Question 2: Let X1, Ys are independent. Let be the pooled varian

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Heve 21, 27 , m i f y , n ndependeno an d indepen den 2 2 in dependen we know hat if rhen n-1)S /VX.n-1 independent! As X,sX and y are also independent (n-リS2 and (m-1ノsy ave also independent 2 independentu, Phen 2.0 0 V2 2 we Know r hat if x~ χ, and y~χ2.2 independently, then n,tMz 2 ntm-2 ve ave ind e pendent of X and n-) S are independen y

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