4 Oxnard Petro, Limited, has three interdisciplinary project development teams that function on an ongoing basis. Team members rotate from time to time. Every 4 months (three times a year) each department head rates the performance of each project team (using a 0 to 100 scale, where 100 is the best rating). Are the main effects significant? Is there an interaction? Year Marketing Engineering Finance 2007 89 66 78 1.5 80 71 98 90 68 91 points 2009 81 83 97 89 76 83 85 80 88 2011 84 78 99 86 69 87 eBook 83 80 88 Click here for the Excel Data File Hint (a-1) Choose the correct row-effect hypotheses. a. Ho: A1 # A2 # A3 + 0 +year means differ Hy: All the A are equal to zero - year means are the same b. Ho: A1 = A2 = A3 = 0