You are a health care administrator, interested in collecting demographic information about your patient population in order to find out whether you are adequately serving low-income people in your community hospital by comparing your own patient data to larger population-based surveys. You find that when you ask patients directly about their income, they usually refuse to answer, but when you ask whether the income is from 0-$25,000, $25,001 - $45,000, or above $45,000, they are more willing to give that information. Of the four types of variables, what kind of variable results from this type of question? Is the data discrete or continuous