Question: Recall the Bacillus subtilis data in Question 5.3.2. Test the null hypothesis that exposure to the enzyme does not affect a workers respiratory capacity (as

Recall the Bacillus subtilis data in Question 5.3.2. Test the null hypothesis that exposure to the enzyme does not affect a worker’s respiratory capacity (as measured by the FEV1/VC ratio). Use a one-sided H₁ and let α = 0.05. Assume that σ is not known.

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