Vocabulary for Experiments_Stat Reasoning

The conditions to be compared in an experiment. These are randomly assigned to subjects.

• lurking variable

• treatments

• subjects

• Placebo

The available group of people (or animals, plants or objects) to which treatments are applied in an experiment.

• double blind

• treatments

• control group

• subjects

In an experiment, a randomly selected group of subjects that gets no treatment, gets a placebo, or gets an established or standard treatment.

• control group

• subjects

• treatments

• observational study

A research study in which available subjects are randomly assigned to two or more different treatments in order to compare how responses to the treatments differ.

• observational study

• experiment

• sample survey

• placebo

Observation of a random sample in order to estimate a characteristic of the larger population from which the sample was taken.

• sample survey

• observational study

• experiment

• lurking variable

A sham or empty treatment that to subjects of an experiment appears to be the real treatment.

• response variable

• subjects

• placebo

• lurking variable

An experiment that is both subject blind and evaluator blind.

• placebo

• double blind

• response variable

• control group

In an experiment, the outcome to be measured.

• response variable

• lurking variable

• subjects

• treatments

A statistical study in which the conditions to be compared are already present in the subjects that are observed.

• control group

• experiment

• observational study

• sample survey

This is what happens when an individual chosen for the sample can't be contacted or refuses to participate.

• bias

• censoring

• nonresponse

• voluntary response