The Effect of Display Height The manager of a bakery producer believed that there is a relationship between the shelf display height at supermarkets and sales (measured in cases of 10 units each). Shelf display height has three levels-bottom (B), middle (M), and top (T)-. To compare these the bakery uses a completely randomized experimental design. For each shelf height, six supermarkets of equal sales potential are randomly selected, and each supermarket displays the product using its assigned shelf height for a month. At the end of the month, sales of the bakery product at the 18 participating stores are recorded, giving the data in table below. Please use the data given on the table below and answer the following questions: 1) State the factor and factor levels. 2) State the experimental units. 3) State the response variable. 4) Conduct a one factor ANOVA by hand (show all the steps) and by using Excel