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.

C. A company has three categories of marketing analysts: (1) with professional qualifications but without work experience, (2) with professional qualifications and with work experience, and (3) without professional qualifications but with work experience. A study exists that measures each analyst’s motivation level (classified as high, normal, and low). A hypothesis of no relation between analyst category and motivation is to be tested.

D. A company has 24 salespersons. The test must evaluate whether their sales performance is unchanged or has improved after a training program.

E. A company has to evaluate whether it should attribute increased sales to product quality, advertising, or an interaction of product quality and advertising.