Chapter 4 Vocabulary - Intro to Statistics

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

• bias

• censoring

• nonresponse

• voluntary response

Selecting individuals from a population who are easy to reach.

• Sample Survey

• Convenience Sampling

• Simple Random Sampling

• Census

In statistics, this is a variable that is manipulated and may cause a change in the response variable.

• factor

• level

• placebo

• treatment

This occurs when there is a systematic pattern of inaccurate answers to a survey question

• nonresponse

• confounding

• response bias

• placebo effect

A group of individuals in the population that are located near each other.

• cluster

• sample

• population

• strata

The entire group of individuals we want information about.

• population

• sample

• census

• strata

A group of experimental units that are known before the experiment to have similarities that will affect their response to the treatment.

• population

• sample

• strata

• block

A treatment that has no active ingredient, but is otherwise like other treatments.

• observational study

• factor

• experiment

• placebo

Measusres the outcome of a study.

• explanatory variable

• response variable

• confounding variable

• factors

This deliberately imposes some treatment on individuals to measure their responses.

• explanatory variable

• response variable

• factor

• experiment