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.
The control group is usually the group in which none of their variables are changed. This group is used in order to compare it with the outcomes of the other groups.
Puncture wounds would be when something punctures the skin, i. e., I stepped on a nail, giving me a puncture wound. When the skin scrapes against a hard surface and tiny blood vessels break in the outer layer of skin, this is called an "abrasion"
