Transportation engineers determined that to help ease traffic, they would set up tolls for solo drivers during rush hour times on Route 74 inside the Capital Beltway. Carpooling drivers with the proper Quick pass would drive free. The toll program began in December 4, 2017. To test the claim that fewer vehicles would use Route 74 after the program began, a count of the number of vehicles was collected from two random samples. One sample collected the number of daily vehicles for 12 randomly selected days prior to December 4, 2017 ("Before") and a second sample collected the number of daily vehicles for another 12 randomly selected days after December 4, 2017 ("After") (up to a year after). Use the significance level = 0.05.

a)

State the hypotheses you would use to test the claim stated in the question.

b)

Calculate the statistic you plan to use to estimate the population parameter. Round this statistic to a whole number.