The following data show the preference of 20 people for a candidate to a public office. A "+" indicates a preference for the Democratic candidate, and a "-" indicates a preference for the Republican candidate. 
With = 0.05, test for a significant difference in the preference for the candidates.
Definitions:
Dietary Intake
The range and amount of food and drink consumed by an individual or group.
Vegetables
Edible plants or parts of plants, typically consumed for their nutritional value.
Nutritional Status
An individual's health condition as determined by the intake, absorption, and use of nutrients.
Chronic Disease
A long-lasting condition that can be controlled but not cured, often affecting individuals' lifestyle, health, and quality of life.
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