Unit 3 Data Collection

Front

What is sampling?

Back

The process of gathering information about a population without investigating every member.

Front

What is simple random sampling?

Back

A method of selecting a sample in such a way that every possible sample of a given size has an equal chance of being chosen.

Front

What is stratified random sampling?

Back

A method that separates the population into homogeneous groups and randomly selects from each group.

Front

What is cluster random sampling?

Back

A method that divides the population into heterogeneous groups and randomly selects entire groups.

Front

What is systematic sampling?

Back

A method that selects individuals systematically from a list.

Front

What are the drawbacks of convenience sampling and voluntary response sampling?

Back

They typically result in bias.

Front

What is an observational study?

Back

A study that collects data without influencing the responses.

Front

What is an experiment in data collection?

Back

A study that deliberately imposes treatments to measure responses.

Front

What is the benefit of random assignment in experiments?

Back

It allows for inference about cause and effect.

Front

What is the benefit of random sampling?

Back

It allows for generalization to a population.