UBC Building Signs Narrative

Short Answer

UBC Building Signs Narrative
A researcher at University of British Columbia (UBC) wanted to determine whether different building signs (building maps versus wall signage) affect the total amount of time visitors require to reach their destination and whether that time depends on whether the starting location is inside or outside the building. Three subjects were assigned to each of the combinations of signs and starting locations, and travel time in seconds from beginning to destination was recorded. A partial computer output of the appropriate analysis is given below:
ANOVA Table
-Refer to UBC Building Signs Narrative. In order to determine the critical value of the F ratio against which to test for differences between the levels of factor A, which numerator and which denominator, respectively, for df should we use?