In a two-factor study. the treatment means I~;i are as follows: FactOr A 34 40 Factor B 23 29 36 42 Chapter 19 Two-Factor Studies with Equal Sample Sizes 865 a. Obtain the factor A level means. b. Obtain the main effects offactor A. c. Does the fact that /1-12 - /1-11 = -II while /1-13 - /1-12 = 13 imply that factors A and B interact? E;lCplain. d. Prepare a tr~~tment means plot and determine whether the two faciOrs interact. What do you find?