A researcher wishes to design a fully blocked experiment with groups of subjects representing every possible combination of 1 ex
planatory variable (control vs. treatment) and 4 other variables (male vs. female, old vs. young, healthy vs. ill, and normal weight vs. overweight) for a total of 5 variables. How many blocks will there be in her experiment?
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.
