Question

question
in the description of the following experiment, determine the experimental factor. during a study testing a new vaccine drug for the zika virus, the research team grouped the volunteers enrolled for the test into group a and group b. group a received an inert drug (placebo) while group b received the vaccine drug.

select the correct answer below:
○ whether or not a person contracts the zika virus
○ all people who could contract zika virus
○ the drug received by each group
○ the group receiving the new vaccine

Explanation:

An experimental factor is the variable that is intentionally changed or manipulated in an experiment to observe its effect. In this study, the researchers manipulated which drug each group received (placebo vs. Zika vaccine). The other options are either the outcome being measured, the population of interest, or a specific group, not the manipulated factor.

Answer:

the drug received by each group