PUBH.3010 Introduction to Biostatistics, Quiz 4 9' Public health professionals collected data and created the following contingency table. They want to conduct a chi square test. :ljaye anxiety Yes _t_\\lo Total Food security Low 50 50 100 Moderate 80 120 200 High 40 [>60 100 High 170 230 400 9a) Write the null and alternative hypotheses for this test of signicance, (1 point) 9b) Calculate the degrees of freedom. (1 point) 90) Find the critical value (1 point) El The researchers should fall to reject the null hypothesis 9d) The calculated chi square value is 3.07. What should the researchers do? D The researchers should reject the null hypothesis