Medal + Fan
A researcher wishes to design a fully blocked experiment with groups of subjects representing every possible combination of 1 explanatory variable (control versus treatment) and 4 other variables (male versus female, old versus young, healthy versus ill, and normal weight versus overweight) for a total of 5 variables.

A. 32

B. 10

C. 5

D. 16

I know it's either 32 or 16 can someone help?!

Question

Medal + Fan 
A researcher wishes to design a fully blocked experiment with groups of subjects representing every possible combination of 1 explanatory variable (control versus treatment) and 4 other variables (male versus female, old versus young, healthy versus ill, and normal weight versus overweight) for a total of 5 variables.

A. 32

B. 10

C. 5

D. 16

I know it's either 32 or 16 can someone help?!

mimi_x3 · Answer

5 variables

mimi_x3 · Answer

each have 2 choices each
so 2 choices 5 times
2*2*2*2*2=2^5=32