A nutritionist examines whether the average daily consumption of energy drinks among 25 college students differs from the national average consumption. The national average is known from previous comp
a) H₀ : μ=μ₀ vs. H₁ : μ≠μ₀
b) H₀ : μ>μ₀ vs. H₁ : μ<μ₀
c) H₀ : μ<μ₀ vs. H₁ : μ>μ₀
d) H₀ : μ≠μ₀ vs. H₁ : μ=μ₀