Answer:
32 ( If each variable has two possibilities).
Explanation:
The variables will represent the different characteristics that had been taken to study the research. There are total 5 variables - control vs. treatment, old vs. young, healthy vs. ill, male vs. female and normal weight vs. overweight.
If a single variable has two possibilities and each possibilites represent a block.
There are total five variables= (2)⁵.= 2 × 2×2×2×2.
Blocks required = 32.
The total blocks in her experiment is 32.
