If Personal Income Up to and Including $30,000 Is Not

question 107

Multiple Choice

If personal income up to and including $30,000 is not taxed, income of $30,001 to $60,000 is taxed at 10%, and income over $60,000 is taxed at 25%, then a family earning an income of $100,000 will pay a MARGINAL tax rate of:

• A) 5%.
• B) 10%.
• C) 13%.
• D) 25%.

---

Definitions:

Independent Variable

In an experiment, the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.

Dependent Variable

A variable in an experiment that is expected to change as a result of manipulations of the independent variable.

Extraneous Variable

Any variable in a scientific experiment that is not the independent or dependent variable but may affect the results of the experiment if not properly controlled.

Random Assignment

A method used in experiments where participants are allocated to different groups purely by chance, minimizing pre-existing differences between those groups.