Linear Statistical Models

Sample Quiz #1

Consider the design

	a1	a2	a3	a4
b1	a	b	c	d
b2	e	f	g	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, when each cell has 10 observations

Stata commands:


or

                           / (         )
F = ______________________________________
    (                    ) / (         )

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Linear Statistical Models Course