3.1-3.3 Review

Front

Why do we randomly select our samples?

Back

To reduce bias in the results.

Front

What is the method called when Marianne randomly picks out 20 names from a container of students' names?

Back

Simple Random Sampling.

Front

What type of study is conducted when a researcher gives different treatments to groups and observes the effects?

Back

Experiment.

Front

What term describes the political party of every U.S. President?

Back

Population.

Front

What is the entire group of objects or individuals considered for a survey called?

Back

Population.

Front

What is the term for a subset of individuals selected from a larger population?

Back

Sample.

Front

What is the purpose of using a control group in an experiment?

Back

To compare the effects of the treatment against a baseline.

Front

What is the difference between observational studies and experiments?

Back

Observational studies observe subjects without manipulation, while experiments involve treatment and control.

Front

What is a random sample?

Back

A sample that is selected randomly from a population, ensuring each individual has an equal chance of being chosen.

Front

What does it mean to eliminate confounding results in research?

Back

To ensure that the results are not influenced by other variables.