EssayNICE | 24/7 Homework Help

Determine the critical region and the critical values used to
test the following null hypotheses. (Assume a Z-test statistic is
appropriate here.)

(a) H₀: μ = 49 (≥),
H_a: μ < 49, α = 0.1

—Select— less than or equal to, greater than or equal to, at
least as extreme as, OR at most as extreme as

—Select– + – ±

–Critical Value: ?

(b) H₀: μ = −77 (≥),
H_a: μ < −77, α = 0.05

—Select— less than or equal to, greater than or equal to, at
least as extreme as, OR at most as extreme as

—Select– + – ±

–Critical Value: ?

(c) H₀: μ = 120,
H_a: μ ≠ 120, α = 0.01

—Select— less than or equal to, greater than or equal to, at
least as extreme as, OR at most as extreme as

—Select– + – ±

–Critical Value: ?

(d) H₀: μ = 20 (≤),
H_a: μ > 20, α = 0.02

—Select— less than or equal to, greater than or equal to, at
least as extreme as, OR at most as extreme as

—Select– + – ±

–Critical Value: ?