The Cond̩ Nast Traveler Gold List for 2012 provided ratings for the top 20 small cruise ships (Cond̩ Nast Traveler website, March 1, 2012). The data shown below are the scores each ship received based upon the results from Cond̩ Nast Traveler۪s annual Readers۪ Choice Survey. Each score represents the percentage of respondents who rated a ship as excellent or very good on several criteria, including Itineraries/Schedule, Shore Excursions, and Food/Dining. An overall score was also reported and used to rank the ships. The highest ranked ship, the Seabourn Odyssey, has an overall score of 94.4, the highest component of which is 97.8 for Food/Dining.

a. Determine the estimated regression equation that can be used to predict the overall score given the scores for Itineraries/Schedule, Shore Excursions, and Food/Dining.
b. Use the F test to determine the overall significance of the relationship. What is your conclusion at the .05 level of significance?
c. Use the t test to determine the significance of each independent variable. What is your conclusion at the .05 level of significance?
d. Remove any independent variable that is not significant from the estimated regression equation. What is your recommended estimated regressionequation?

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Itineraries/ Overall Excursions D Seabourn Odyssey National Geographic Endeavor Seabourn Legend irn un Sojourn urr Seven Seas Navigator National Geographic Explorer 9