Express the Null Hypothesis $\mathrm { H } _ { 0 }$

Multiple Choice

Express the null hypothesis $\mathrm { H } _ { 0 }$ and the alternative hypothesis $\mathrm { H } _ { 1 }$ in symbolic form. Use the correct symbol ( $\mu , \mathrm { p }$ , $\sigma$ ) for the indicated parameter.
-Carter Motor Company claims that its new sedan, the Libra, will average better than 30 miles per gallon in the city. Use $\mu$ , the true average mileage of the Libra.

A) $\begin{array}{l}\mathrm{H}_{0}: \mu=30 \\\mathrm{H}_{1}: \mu>30\end{array}$

B) $\begin{array}{l}\mathrm{H}_{0}: \mu<30 \\\mathrm{H}_{1}: \mu \geq 30\end{array}$

C) $\begin{array}{l}\mathrm{H}_{0}: \mu>30 \\\mathrm{H}_{1}: \mu \leq 30\end{array}$

D) $\begin{array}{l}H_{0}: \mu=30 \\H_{1}: \mu<30\end{array}$