00286 Ðc3866821af523e1438f1ebef70e6a9

288

Montgomery & Runger

Legend: A= 1 obs, B=2 obs, etc.

Y

31.2 + A

311 +

31.0 + A

30.9 + 30.8 +

A

A

B

A

A

A

A

A

A

30.7 +A 30.6 +A 30.5 +

1

2

3

SITE

A

A    A

A

A

A

4

5

FigurÄ™ 4b. Response y Versus Levels of Sites; Site 1 Shows Significantly Larger

Yariability.