Rejection Region Example

H₀: µ = 70,000 or µ > 70,000 or µ ≥ 70,000

H_a: µ < 70,000

Alpha, α =

Risk Level Significance Level Rejection Region

One-Tailed Tests

Alpha α = 5% or .05 Confidence Level = 1 – α = 95% or .95

Two-Tailed Tests

Alpha α/2 = (5/2)% or .025

Note: α is always 5% or .5 unless otherwise given.

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