Question

Fire extinguishers tested to see how quickly they put out fires. Factor A: 3 different chemicals in the extinguishers A1, A2, A3. Factor B: 2 types of fires, B1 = wood, B2 = gas. Ykj= time to put out the fire of type Bj with chemical Ak. If the differences in times for the 3 chemicals depend on the type of fire, what does it mean?

Select one:

a. None

b. there is an Factor B effect

c. Doesn't mean anything

d. there is an interaction between chemical type and fire type

e. there is a Factor A effect

Answer 1

Option Number b) is the correct answer. Variable of interest is time and the difference in times depends only on Types of fires but not on tyoes of chemicals.