36. Cond Nast Traveler conducts an annual survey in which readers rate their favorite cruise ships. Ratings are provided for small ships (carrying up to 500 passengers), medium ships (carrying 500 to 1500 passengers), and large ships (carrying a minimum of 1500 passen- gers). The following data show the service ratings for eight randomly selected small ships, eight randomly selected medium ships, and eight randomly selected large ships. All ships are rated on a 100-point scale, with higher values indicating better service (Cond Nast Traveler, February 2003).