You want to know something about your neighbors, so you give them a survey. The survey collects the following data about each family on your block: family size, the kind of pets they have, the grade of the youngest child in the family, the family's annual income in dollars, what the dad does for a living, whether the mom works, and their phone number. Each kind of data you collect about a family is a variable. Which of the variables you collect are continuous data?
Annual income and phone number
Only family size
Grade of youngest child and annual income
Only annual income
Annual income and family size
Annual income and phone number
Only family size
Grade of youngest child and annual income
Only annual income
Annual income and family size
-
Only annual income. A variable is continuous if it can take any value in-between two possible data, while for instance, it's not possible for the family size to be 5.335.