Suppose the population distribution is normal with known σ. Let ϒ be such that 0 < ϒ...

Suppose the population distribution is normal with known σ. Let ϒ be such that 0 < ϒ < a. For testing H₀: μ = μ₀ versus H_a: μ ≠ μ₀ consider the test that rejects H₀ if either where the test statistic is