A certain mayor has proposed a fee of five dollars per day on private vehicles entering the city, claiming that the
fee will alleviate the city’s traffic congestion. The mayor reasons that, since the fee will exceed the cost of
round-trip bus fare from many nearby points, many people will switch from using their cars to using the bus.
Which of the following statements, if true, provides the best evidence that the mayor’s reasoning is flawed?
Psychological research indicates that college hockey and football players are more quickly moved to hostility
and aggression than are college athletes in no contact sports such as swimming. But the researchers’
conclusion – that contact sports encourage and teach participants to be hostile and aggressive – is untenable.
The football and hockey players were probably more hostile and aggressive to start with than the swimmers.
Which of the following, if true, would most strengthen the conclusion drawn by the psychological researchers?
For dinner at a restaurant, there are x choices of appetizers, y + 1 main courses, and z choices of dessert. How
many total possible choices are there if you choose 1 appetizer, 1 main course, and 1 dessert for your meal?