Random Samples

Front

What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger population, where each individual has an equal chance of being selected.

Front

Why is it important to use random samples in surveys?

Back

Using random samples helps to ensure that the survey results are representative of the entire population, reducing bias.

Front

What is the difference between a sample and a population?

Back

A population includes all members of a specified group, while a sample is a smaller group selected from that population.

Front

What is a biased sample?

Back

A biased sample is one that does not accurately represent the population, often due to non-random selection methods.

Front

What is an unbiased sample?

Back

An unbiased sample is one that accurately reflects the characteristics of the population from which it is drawn.

Front

What is systematic sampling?

Back

Systematic sampling involves selecting every nth individual from a list or sequence, ensuring a random starting point.

Front

What is convenience sampling?

Back

Convenience sampling involves selecting individuals who are easiest to reach, which can lead to bias.

Front

What is stratified sampling?

Back

Stratified sampling involves dividing the population into subgroups (strata) and randomly sampling from each stratum.

Front

What is the purpose of surveying a sample?

Back

The purpose of surveying a sample is to gather information about a population without needing to survey every individual.

Front

How can you determine if a sample is biased?

Back

A sample can be determined to be biased if the selection method favors certain individuals or groups over others.