A Truck Company Wants On-Time Delivery For $98 \%$ Of the Parts They Order from a Metal Manufacturing Plant

A truck company wants on-time delivery for $98 \%$ of the parts they order from a metal manufacturing plant. They have been ordering from Hudson Manufacturing but will switch to a new, cheaper manufacturer (Steel-R-Us) unless there is evidence that this new manufacturer cannot meet the $98 \%$ on-time goal. As a test the truck company purchases a random sample of metal parts from Steel-R-Us, and then determines if these parts were delivered on-time. Which hypothesis should they test?

A) $\mathrm { H } _ { 0 } : p = 0.98$
$$\mathrm { H } _ { \mathrm { A } } : p \neq 0.98$$
B) $\mathrm { H } _ { 0 } : p > 0.98$
$$\mathrm { H } _ { \mathrm { A } } : p = 0.98$$
C) $\mathrm { H } _ { 0 } : p = 0.98$
$$\mathrm { H } _ { \mathrm { A } } : p > 0.98$$
D) $\mathrm { H } _ { 0 } : p = 0.98$
$$\mathrm { H } _ { \mathrm { A } } : p < 0.98$$
E) $\mathrm { H } _ { 0 } : p < 0.98$
$$\mathrm { H } _ { \mathrm { A } } : p > 0.98$$