The midterm is comprehensive so you should review the material covered in the first three lectures. Remember to review the quizzes and associated practice problems. There will be no questions on SAS.
Following are several important details:
To further aid your preparation here are three questions and the solutions.
Note that these questions are primarily intended to aid in preparing you for the computational sections of questions. You should be prepared to discuss your computations/results. For example, if you are asked to construct a confidence interval then you will also be asked to interpret the confidence interval.