Question: Will n = 45 be a sufficiently large sample to test H 0 : = 10 versus H 1 : 10 at

Will n = 45 be a sufficiently large sample to test H₀: μ = 10 versus H₁: μ ≠ 10 at the α = 0.05 level of significance if the experimenter wants the Type II error probability to be no greater than 0.20 when μ = 12? Assume that σ = 4.

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