Sampling and Bias

Front

What is the purpose of randomly selecting samples?

Back

To reduce bias in the results.

Front

What does the term 'population' refer to in sampling?

Back

The group of people, objects, or events being surveyed.

Front

Identify the population in the following scenario: Shenandoah County Public Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective.

Back

All Shenandoah County Teachers.

Front

What type of sampling method is used when selecting every third person on a class list?

Back

Systematic sampling.

Front

What is the definition of simple random sampling?

Back

A sampling method where each member of the population has an equal chance of being selected.

Front

What is systematic sampling?

Back

A method where samples are selected at regular intervals from a randomly ordered list.

Front

What is stratified sampling?

Back

A sampling method that involves dividing the population into subgroups and randomly sampling from each subgroup.

Front

What is cluster sampling?

Back

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

Front

What is sampling bias?

Back

A bias that occurs when certain members of the population are systematically more likely to be selected than others.

Front

What is the difference between a sample and a population?

Back

A sample is a subset of the population used to represent the whole.