Question

a. in a designed experiment, what are the experimental units?
b. if the experimental units are humans, what term is often used in place of experimental unit?
a. choose the correct answer below.
a. the individuals or items on which the experiment is performed
b. the group receiving the specified treatment
c. the group receiving placebo
d. the experimental conditions
b. choose the correct answer below.
treatment
subject
placebo
factor

Explanation:

Part a

To determine the correct answer for part a, we analyze each option:

• Option A: Experimental units are defined as the individuals or items on which the experiment is performed. This matches the definition of experimental units.
• Option B: The group receiving the specified treatment is the treatment group, not experimental units.
• Option C: The group receiving placebo is the control group (in some cases), not experimental units.
• Option D: Experimental conditions are the settings of the experiment, not the units.

For part b, when experimental units are humans, the term "subject" is commonly used instead of "experimental unit".

• "Treatment" refers to what is administered to the experimental unit/subject.
• "Placebo" is a type of treatment (a dummy treatment).
• "Factor" is a variable whose levels are manipulated in the experiment.

Answer:

A. The individuals or items on which the experiment is performed

Part b