To minimize the potential for gastrointestinal disease outbreaks, all passenger cruise ships arriving at U.S. ports are subject to unannounced sanitation inspections. Ships are rated on a 100-point scale by the Centers for Disease Control and Prevention. A score of 86 or higher indicates that the ship is providing an accepted standard of sanitation. The latest (as of October 2015) sanitation scores for 195 cruise ships are saved in the accompanying file. The first five and last five observations in the data set are listed in the accompanying table.

a. Generate both a stem-and-leaf display and histogram of the data.
b. Use the graphs to estimate the proportion of ships that have an accepted sanitation standard. Which graph did you use?
c. Locate the inspection score of 69 (Bahama Mama) on the graph. Which graph did you use?

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Cruise Ship Cruise Line Score Adonia P&O Cruises 96 84 Adventure of the Seas AIDAaura Royal Caribbean International Aida Cruises 86 AIDABella AIDAluna Aida Cruises Aida Cruises 98 87 Voyager of the Seas Royal Caribbean International VSP Office Cruise Line Holland America Line Holland America Line Holland America Line 96 Vspbeta Westerdam Zaandam Zuiderdam 100 95 97 100