1. Parents have been looking for dairy products with vitamins A and D because the vitamins have many health benefits for children. Noticing this trend in consumer preference, a national dairy company has been considering adding vitamins A and D to their milk products. But because adding supplements to milk means additional cost to a milk producer (e.g., the producer needs to procure good quality vitamins from suppliers, prepare facilities to add the vitamins to their products, and so on), the company would add the vitamins only if it found the added vitamins' positive effect on milk salesthat is, only if vitamins A and D increased milk sales. To find out if the vitamins would help the company sell more milk, it conducted the following experiment. First, it created a new package design (P2) and distributed it along with the existing package design (P1), as in Figure 1. Package P1, the existing design, does not show that the milk contains vitamins A and D, while package P2, the new one, does