You work in a very large metropolitan police department and have been assigned to a committee to select new patrol cars. Three models are in contention The Dodge Charger, The Chevrolet Tahoe, The Ford Interceptor. Your initial testing determines that all three models meet your department's basic needs and that they are all comparably priced.So the final decision is really based on the personal preference of the officers. You and the members of your committee send out a simple survey asking each officer to indicate which of the three models he or she prefers. This survey indicates the following:

Vehicles	Percent of Officer Preference
The Dodge Charger	45%
The Chevrolet Tahoe	42%
The Ford Inceptor	13%
Totals	100%

Given the closeness of officer preference between the Dodge Charger and Chevrolet Tahoe it will be important now to determine whether the differences in preference are statistically significant, i.e. not due to chance. Your start with a hypothesis:

Hypothesis: The difference in officer preference between the Dodge Charger and Chevrolet Tahoe is statistically significant.

Answer the following questions.

1. At what level is the variable 'officer preference' measured (nominal, ordinal, or scale)?

2. What type of hypothesis is this (association or difference)?

3. Which statistical technique would be the most appropriate for analyzing these data?