Question: Many chain supermarkets have had to close due to the impact of Wal-mart “Super Stores. In addition, regional discounters, such as WINCO in the western United States have made it difficult for traditional grocery chains. Albertsons and traditional grocery chains are struggling to stay in business. At the core of the situation is whether there is a price difference offered in the three stores. A sample of “market basket” items was selected and prices obtained from the three stores. Using the alpha level of .05, conduct a test to determine if the stores have equal mean prices. If you conclude there are differences in the mean process, perform the appropriate posttest to determine which store(s) have different means. What are the assumptions underlying the use of this statistic. Cite the critical value and test statistic.