Let X 1 and X 2 constitute a random sample from a normal population with 2 1 If the null hypothesis 0 is to be rejected in favor of the alternative hypothesis 1 0 when 0 1, what is the size of the critical region ...

Let X 1 and X 2 constitute a random sample from a normal population with 2

Question:

Let X₁ and X₂ constitute a random sample from a normal population with σ² = 1. If the null hypothesis µ = µ₀ is to be rejected in favor of the alternative hypothesis µ = µ₁ > µ₀ when > µ₀ + 1, what is the size of the critical region?