General instructions. Please write your full name at the top of every page you hand in. Please collate and staple your pages together. Please write clearly and thoroughly explain all your computations; an unannotated series of formulas that mysteriously ends up with the correct number will not be given full credit. When doing the homework, you are encouraged to use all resources at your disposal to the extent that they help you learn the material; nevertheless, you must write your own answers in your own words.

1. (6 pts.)
   Ch. 7, p. 343, #1. (The tables in this exercise are displayed strangely. The "1 2 3" in the first row and column refer to the levels of factors A and B. The actual means are a 3x3 sub-array.)

2. (7 pts.)
   Ch. 7, p. 344, #4.

3. (7 pts.)
   Ch. 7, p. 344, #5.