CA 4.3 Samples and Studies

Front

What is a volunteer sample?

Back

A sample consisting of units of the population that choose to respond, often leading to bias.

Front

What is a convenience sample?

Back

A sample consisting of units of the population that are easily accessible, which may not represent the entire population.

Front

What is the main difference between experiments and observational studies?

Back

An experiment can establish a causal relationship if variables are controlled, while an observational study cannot.

Front

What is an over-estimate in survey results?

Back

When respondents indicate a higher willingness or preference than what may actually occur in reality.

Front

What is a sample in the context of surveys?

Back

A subset of the population selected for the survey to represent the larger group.

Front

What is a census?

Back

A survey that attempts to include every member of the population.

Front

What is a response variable?

Back

The outcome or effect that is measured in an experiment to see if it changes due to the manipulation of the explanatory variable.

Front

What is an explanatory variable?

Back

A variable that is manipulated in an experiment to observe its effect on the response variable.

Front

What is bias in sampling?

Back

A systematic error that leads to an incorrect representation of the population.

Front

What is a cluster sample?

Back

A sampling method where the population is divided into clusters, and entire clusters are randomly selected.