Question: High-income earners argue that they already are paying enough taxes. To test this claim, the Internal Revenue Service takes a random sample of 500 high-incoMeand 500 low-income taxpayers and from their 2004 income tax forms, records their reported total taxable incoMeand the amount of taxes they paid. A “percentage of income paid in taxes” is calculated for each individual (e.g., if an individual’s annual income was $200,000 and they paid $50,000 in taxes, then the “percentage of income paid in taxes” for that individual is 25.0).

(a) State the null and research hypotheses. (2 points)

(b) Which statistical procedure should be used to determine whether the high-income earners are paying a larger percentage of taxes than low-income earners? (2 points)