22. A scientist collected the following data: What are the main effects? A) T =

ID: 3331965 • Letter: 2

Question

22. A scientist collected the following data:

What are the main effects?

A) T = 1.5; C = 1.5; S = 13.5

B) T = 13.5; C = 1.5; S = 1.5

C) T = 1.5; C = 13.5; S = 1.5
D) None of the above

assuming no interactions, what can we conclude?
A) There are no significant factors.

B) There is only one significant factor.

C) There are only two significant factors.
D) All three factors are significant.

what is the interaction between concentration & speed?
A) Borderline

B) Insignificant

C) Significant
D) None of the above

Speed Fast Slow Fast Slow Fast Slow Fast Slow lemperature Hi Hi Hi Hi Concentration 80% 80% 60% 60% 80% 80% 60% 60% Result 30 12 26 24 12

1) Correct answer is A

S = (18+16+12+8 )/ 4 = 13.5

T = (6+0+4-4)/4=1.5

C = (4+2+2-2)/4=1.5

2) There is only one significant factor because sign does not change for S and is of high magnitude.

3) Interaction between concentration and speed is significant.

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