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# To minimize the potential for gastrointestinal disease outbreaks, all passenger cruise ships arriving at US ports

INSTRUCTIONS TO CANDIDATES

Activity 1 - Describe Qualitative and Quantitative Data

To minimize the potential for gastrointestinal disease outbreaks, all passenger cruise ships arriving at US 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 March 2019) sanitation scores for 211 cruise ships are saved in the file “Sanit.xlsx”.

There are five variables

1. Cruise Ship: The name of the ship

2. Cruise Line: The company that operates the cruise ship

3. Date: The date of inspection

4. Score: Sanitation inspection score on a 100-point scale

5. Flag: The ship’s registration country under whose laws it is registered/licensed

In this study, we will focus on two variables, Flag  and Score.  Flag is a qualitative variable and Score is a quantitative variable.

(write in complete English sentences where possible)

1. Construct a table to summarize the class frequency [Excel: =countif(data,“Europe”)], class relative frequency, and class percentage of Flag data.

2. Create a bar graph of Flag data using class relative frequency. Interpret the results.

3. Create a pie chart of Flag data using class percentage. Interpret the results.

4. Find the minimum [Excel: =min(data)] and maximum [Excel: =max(data)] observa- tions/measurements of Score data.

5. Create a histogram of Score data using six bins on the range of the data (from mini- mum to maximum).

6. Use the histogram to compute the proportion of ships that have a score higher than 86.

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