Use the Following Information for Questions

Short Answer

Use the following information for questions:
At a soap and shampoo factory, employees work in three different shifts: morning, evening, and night. At the shampoo production line, each shift produces six batches of shampoo. The quality control inspector wishes to compare the pH level of the shampoo between the different shifts and between the different batches. Several bottles of shampoo are randomly selected from each batch during each shift. The SPSS output is provided below.
-Refer to the profile plot given in problem 81. What feature of this profile plot tells us that there is a main effect due to batch?