You are selling Sunday papers on the street outside Home Depot. One Sunday, you use a portable electric billboard that says "Buy Your Sunday Paper Here" and you sell $53 worth of papers in the morning and $49 in the afternoon. On another Sunday, you use a small, hand-written sign with the same message and sell $23 worth of papers in the morning and $16 in the afternoon. Answer the following two questions with this situation:

(a) If a DOE were performed, what would be the response? What would be the factor and how many levels would this factor have? 

(b) Using your answers above, compute the exact t-test statistic and decide if the factor is significant at α = 0.15. Perform the exact t-test even if s1/s2 is not in the recommended interval for this test.