The following table displays the number of students graduated in each major of three classes at the university. Class Science Art Engineering Total 2016 92 73 146 31 1 2017 121 53 21 1 385 2018 102 63 243 408 Total 315 189 600 1 104 We are interested in testing whether class and major preference are independent. State the null hypothesis with the mathematical expression. {1 points) Choose a proper test statistic and compute it. (1 points) What is the degree of freedom of this test? (1 points) Conduct the hypothesis testing and make conclusion under the signicance level a = 0.1. (1 points) Upload your answers and steps for independence test here