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Suppose that X1,..Xn are iid N(0,σ2) where σ>0 is the unknown parameter. with preassigned α in...

Suppose that X1,..Xn are iid N(0,σ2) where σ>0 is the unknown parameter. with preassigned α in (0,1), derive a level α LR test for the null hypothesis H0: σ2 = σ02 against H1: σ2/=σ02 in the implementable form. (Hint: When is the function g(u) = ue1-u, u > 0 increasing? When is it decreasing? Is your test one-sided or two-sided?)

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