Menu space is always limited in fast food restaurants. However, McDonald’s has decided that it needs to add one more salad dressing to its menu for its garden salad and check salad. It has decided to test market four flavors: Caesar, Ranch-style, Green Goddess, and Russian. Fifty restaurants were selected in the North-Central region to sell each new dressing. Thus, a total of 200 stores were used in the research project. The study was conducted for two weeks and the units of each dressing sold are shown below. As a researcher, you want to know if the differences among the average daily sales of the dressings are larger than can be reasonably expected due to chance. If so, which dressing would you recommend be added to the inventory throughout the United States?