For Exercises 4–6, do the following.

  1. Provide the null and alternative hypotheses.
  2. Describe the two ways a correct decision could be made.
  3. Describe what a Type I error would mean in the context of the problem.
  4. Describe what a Type II error would mean in the context of the problem.

Question 9.389

4. Household Size. The U.S. Census Bureau reported (2010) that the mean household size is 2.58 persons. We conduct a hypothesis test to determine whether the population mean household size has changed.