12. The 30-mile I-287 corridor near Tarrytown, New York, is heavily traveled and is a major interstate transportation link. The Tappan Zee Bridge is part of this road network and is in need of structural repairs. Approximately 140,000 vehicles cross this bridge every day. Transportation officials have decided to conduct a hypothesis test and will raise tolls to fund planned repairs if there is evidence to suggest that the mean number of cars per day using this bridge has increased.

12(a). Write the null and alternative hypotheses about , the mean number of cars per day that cross the Tappan Zee Bridge.

H₀: = 140000 H_a: [ Select ] [">", "", "<"] 140000

12(b). If a Type I error is committed, who is more angry, the transportation officials or drivers, and why?

[ Select ]

-"Drivers are more angry. The tolls did not have to be raised.",

-"Transportation officials are more angry. The tolls were needed to fund planned repairs.",

-"Transportation officials are more angry. The tolls did not have to be raised.",

-"Drivers are more angry. The tolls were needed to fund planned repairs."

12(c). If a Type II error is committed, who is more angry, the transportation officials or drivers, and why?

[ Select ]

-"Transportation officials are more angry. The tolls did not have to be raised.",

-"Drivers are more angry. The tolls did not have to be raised.",

-"Drivers are more angry. The tolls were needed to fund planned repairs.",

-"Transportation officials are more angry. The tolls were needed to fund planned repairs."