Question: Let X1,..., Xn be a random sample from a n((, 2) population. Compare expected lengths of 1 - confidence intervals for that are

Let X1,..., Xn be a random sample from a n((μ, σ2) population. Compare expected lengths of 1 - α confidence intervals for μ that are computed assuming
σ2 is known.
σ2 is unknown.

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