What hypothesis testing procedure would you use in the following situations?
a. A test classifies applicants as accepted or rejected. On the basis of data on 200 applicants, we test the hypothesis that ad placement success is not related to gender.
b. A company manufactures and markets automobiles in 2 differenct countries. We want to know if the gas mileage is the same for vehicles from both facilities. There are samples of 45 units from each facility.