Author Question: The owners of an industrial plant want to determine which of two types of fuel (gas or electricity) ... (Read 62 times)

Yolanda · **on:** Feb 14, 2020

Question 1

The screen below shows the 95% confidence interval for

What does the interval suggest about the relationship between μ1 and μ2?

Question 2

The owners of an industrial plant want to determine which of two types of fuel (gas or electricity) will produce more useful energy at a lower cost. The cost is measured by plant investment per delivered quad ($ invested /quadrillion BTUs). The smaller this number, the less the industrial plant pays for delivered energy. Suppose we wish to determine if there is a difference in the average investment/quad between using electricity and using gas. Our null and alternative hypotheses would be:
◦ H₀: (μ_e - μ_g) = 0 vs. H_a: (μ_e - μ_g) ≠ 0
◦ H₀: (μ_e - μ_g) = 0 vs. H_a: (μ_e - μ_g) = 0
◦ H₀: (μ_e - μ_g) = 0 vs. H_a: (μ_e - μ_g) > 0
◦ H₀: (μ_e - μ_g) = 0 vs. H_a: (μ_e - μ_g) < 0

underwood14 · **Reply #1 on:** Feb 14, 2020

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