The crime rate is lower in cities with more police officers. The presence of police officers deters crime. As age increases, life satisfaction increases. As military expenditures increase, the nations security does not change. Military expenditures are related to aggression, not security.
Whites are more likely to place the elderly in retirement homes than non-whites.
Whites can more easily afford to place the elderly in retirement homes. The number of people in your family is discrete. The percentage of university students who attended public high school is continuous. The U.S. unemployment rate is continuous. Inferential e. Descriptive, because information is from all employees.