QUIZ VII (10 marks)
1. A 27-2 design has
a) how many experiments?
b) it is (i) ¼ factorial of 128 experiments (ii) ½ factorial of 64 experiments (iii) ½ factorial of 2 6
experiments (iv) full factorial of 25 experiments
c) it has a resolution of
2. A 23 design experiments are carried out to maximise the biomass production as shown below
T
-1
-1
-1
-1
+1
+1
+1
+1
pH
-1
-1
+1
+1
-1
-1
+1
+1
DO
-1
+1
-1
+1
-1
+1
-1
+1
Biomass
9
8
12
9
7
12
11
10
a) what is the effect of T on Biomass (give answer rounded to one decimal place)
b) what is the effect of pH on Biomass (give answer rounded to one decimal place)
c) what is the effect of DO on Biomass (give answer rounded to one decimal place)
d) what is the effect of T*pH on Biomass (give answer rounded to one decimal place)
e) what is the effect of T*DO on Biomass (give answer rounded to one decimal place)
f) what is the effect of DO*pH on Biomass (give answer rounded to one decimal place)
g) what is the effect of T*pH*DO on Biomass (give answer rounded to one decimal place)