You are the regional sales manager for Albertson's grocery store chain. You want to test the sales effect of a coupon placed in the market for a four week period. The coupons will be printed in Thursday's and Sunday's newspaper editions. There are fifty Albertson stores in your region. You want to make certain that you have very accurate measures of the sales effect attributed to the coupon campaign. Set up a pre or true experimental design that will provide you with the most accurate measure of the sales effect you desire. Be sure to use proper notation and appropriate descriptions for each notation. a. Your design with notation is: b. This design is called?