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.
Out of the choices given, to ensure that Rachel properly applied all the necessary FITT principles to her plan, she needs to add more cardiovascular training to her exercise routine and eat several low-calorie meals throughout the day. The correct answer is A.
