b1 | b2 | b3 | ||
a1 | s1 | a | b | c |
s2 | d | e | f | |
a2 | s3 | g | h | i |
s4 | j | k | l |
1. Use orthogonal coding to code this design. Indicate which columns are for which effects. Hint: More columns are provided than are needed.
x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 a b c d e f g h i j k l*****