As a result of numerous high-profile incidents, at the end of 2009 the Department of Transportation issued regulations that
A) resulted in cost spikes for airline passengers and was repealed within a year.
B) led to increased flight delays and missed connections throughout 2010.
C) had the unintended consequence of increasing the average tarmac wait.
D) led to a wave of airline mergers in the following six months.
E) had the effect of reducing controllable tarmac delays to nearly zero.
E
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If we were doing a study in which we wanted to apply the findings to the whole population of the United States, it would be necessary to
A) Draw a nonrandom sample from the entire U.S.A. B) Take a random sample from the entire U.S.A. C) Use only participants from our local area. D) Use a nonstratified local sample.
A researcher using an experimental design to study the effects of alcohol must
A) make sure that participants are legally able to drink. B) be truthful about the content of the beverage that the participant is asked to consume. C) ask participants to not drink for two days before the experiment. D) All of the above