Experimental Units and Treatments

An ​ (a)   does not have treatments imposed.

An ​ (b)   has treatments imposed.

• Observational Study

• Experiment

The object/person to which a treatment is randomly assigned.

• experimental unit

• treatment

• random assignment

• control group

Design in which the experimental units are assigned to the treatments (or treatments to the experimental units) completely at random.

• completely randomized design

• random assignment

• confounding

• voluntary response sample

A study in which researchers deliberately impose treatments (conditions) on individuals to measure their responses.

• treatment

• observational study

• experiment

• sample

The smallest collection of individuals to which a treatment is to be applied.

• Experimental Unit

• Sample

• Variable

• Treatment Group

Identify the term: A treatment is imposed upon a subject and a response is recorded.

• Double Blinding

• Experiment

• Treatment

• Placebo Effect

The individuals on which the experiment is done are called ___.

• experimental units

• treatments

• subjects

• factors

In a completely randomized design, the treatments are assigned to all the experimental units completely by chance.

• True

• False

In ______ units are sorted into subgroups or blocks, and then treatments are randomly assigned within the blocks.

• completely randomized design

• randomized block design

• matched pairs design

• blocking

Individuals on whom an experiment is performed

• factor

• experimental unit

• treatment

• placebo