Which Web site offers better fares-Cheaptickets.com or Expedia.com? We conducted searches in February 2007, not all that far ahead, for the cheapest fares for round-trip international flights during peak summer travel season: leaving on July 7, 2007, and returning on July 28, 2007. We conducted a search for each itinerary using both search engines.

a. What is the independent variable and what are its levels? What is the dependent variable?

b. Is this a between-groups or within-groups design? Explain.

c. Conduct all six steps of hypothesis testing for a Wilcoxon signed-rank test for matched pairs.

d. How would you present these statistics in a journal article?