David Anderson has been working as a lecturer at Michigan State University for the last three years. He teaches two large sections of introductory accounting every semester. While he uses the same lecture notes in both sections, his students in the first section outperform those in the second section. He believes that students in the first section tend to get higher scores, and have different variability in their scores. David decides to carry out a formal test to validate his hunch regarding the difference in average scores In a random sample of 27 students in the first section, he computes a mean and a standard deviation of 79.6 and 9.3, respectively. In ' the second section, a random sample of 35 students results in a mean of 74.1 and a standard deviation of 6.8. Use a 1% level of significance to test if the first section, on average, out performs the second section. Select the null and alternative hypotheses Select one: O a. Ho: H1 S M2 Ha H1 > H2. O b. Ho: M1 2 12 Ha pi H2 Ha Hi S H2 d. Ho: M1