Question

1. Identify the type(s) of variable(s) for the following study:

A Pew Research Center poll randomly selected and surveyed 2,002 US adults in the 25-32 age group and asked about their annual income. They found strong evidence that the unemployment rate for people without a college degree was higher than the unemployment rate of those with a college degree. Select one.

1. One categorical variable
2. One quantitative variable
3. Two quantitative variables
4. Two categorical variables
5. One categorical and one quantitative variable (independent groups)
6. One categorical and one quantitative variable (dependent groups)

Answer 1

Income is a quantitative variable & employment situation is categorical because there are only two possibilities: Either he is an employee or either he is unemployed. But there is strong evidence that the unemployment rate for people without a college degree was higher than the unemployment rate of those with a college degree.

It means the researcher has two categorical variable & one quantitative variable but he may drop one categorical variable because they are correlated.

Thus, one can say that the best option is for a single choice: Researcher has One categorical and one quantitative variable (dependent groups) (E)