= 40.1     Ha: μ ≠ 40.1.   b. H0: μ ≥ 40.1     Ha: μ < 40.1.   c. H0: μ < 40.1     Ha: μ ≥ 40.1.   d. H0: μ > 40.1     Ha: μ ≤ 40.1.

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