## Finding a Critical Region

Let X1, X2, …, X10 be a random sample of size ten from the Normal(3, σ2) distribution.
(a) Use the likelihood ratio test to derive a 5%-level critical region for testing H0 : σ2 = 1
versus H1 : σ2 ≠ 1.
(b)Suppose the following ten values from the Normal(3, σ2) distribution are observed. Do we