Statistics Solutions

[Solution] A 2003 New York Times/CBS News poll sampled 523 adults who were planning a vacation during the next six months and found that 141 were expecting

Question: A 2003 New York Times/CBS News poll sampled 523 adults who were planning a vacation during the next six months and found that 141 were expecting to travel by airplane (New York Times News Service, March 2, 2003). A similar survey question in a May 1993 New York limes/CBS News poll found that of 477 adults who were planning a vacation in the next six months, 8.1 were expecting to travel by airplane. -

  1. State the hypotheses that can be used to determine whether a significant change occurred in the population proportion planning to travel by airplane over the 10-year period.
  2. What is the sample proportion expecting to travel by airplane in 2003? In 1993?
  3. Use a = .01 and test for a significant difference. What is your conclusion?
  4. Discuss reasons that might provide an explanation for this conclusion.

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