ast semester, the average final exam score for Instructor Gayle's MAT 152 students was 75. Ms. Gayle believes the average is less than the score for the current semester. At the end of the current semester, she took a sample of her students' final exam scores: 75, 50, 59, 85, 71, 66, 63, 62, 71, 72, 90, 84, 80, 58, 77 Does the evidence suggest that Instructor Gayle was correct? Use a level of significance equal to 0.05. (12 points) State the null and alternative hypotheses. (2 points) Should we perform a z-test or a t-test? Explain your answer. (2 points) Compute the p-value. (4 points) Do you reject the null? Explain. Use the = 0. 05 level. (2 points) State a conclusion. (2 points)