6. Describe the following linear associations. 7. When mixing wood-laminating ad

Question

6. Describe the following linear associations. 7. When mixing wood-laminating adhesives, tannin is often added to the usual phenol-resorcinol formaldehyde (PRF) resin for strength purposes. Four mixtures of resin and tannin were subjected two types of environment tests: a dry shear test and a two-hour boil test. The resulting strengths of the laminated wood (in psi) were recorded in the table below Test Dry Shear 2-hr Boil 1,460 50/50 2,267 140 1,450 1,620 40/60 1,683 2.287 760 2,080 130 1,750 23/77 650 1,850 a. at can you conclude about the effects of both the mixture and environment on wood laminate strengths? b. Should the main effects or interaction effects be interpreted? c. Attach the effects plot you indicated in part b. Interpret the plots

Explanation / Answer

#6

a. Since overall pattern moves from lower left to upper right and points follow a straight line pattern, there is strong positive association between variables.

b. Since overall pattern moves from upper left to lower right and points do not follow a strong straight line pattern, there is moderate negative association between variables.

c. Since overall pattern moves from upper left to lower right and points follow a strong straight line pattern, there is strong negative association between variables.

d. Points show curved relationship between variables.

e. Since overall pattern moves from lower left to upper right and points follow a moderate line pattern, there is moderate positive association between variables.

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