Consider this split-plot factorial design

		b1	b2
a1	s1	a	e
	s2	b	f
a2	s3	c	g
	s4	d	h

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

2. Give the Stata commands beginning with regress that will test the A main effect or use R²'s to compute the F-ratio for A main effect.

Stata commands:


or

                           / (         )
F = ______________________________________
    (                    ) / (         )

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Linear Statistical Models Course