Read the given scenario and pick the correct test procedure. Think about the type of data, how many variables, and how many samples were taken. a. ) A random sample of final exams in MTH165 are graded to see if the distribution of grades differs from the following distribution: 20% As, 30% Bs, 30% Cs, 15% Ds, 5% Fs. Which of the following inferential techniques would you use? 2-Proportion Z-Test b. ) A university wants to know if there is an association between the instructor a student has and the letter grade the student gets on the departmental final exam. Which of the following inferential techniques would you use? 1-Proportion Z-Test