1. What is the set of null and alternative hypotheses if we want to determine whether the thickness of papers produced at these two plants is the same? (2 points)
  2. Using a level of significance of 0.05, what is the rejection rule for this test using the critical value approach? (2 points)
  3. Calculate the t statistic (2 points)
  4. Based on the above, what is the conclusion of this statistical test? (2 points)