Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the entire group in statistical analysis.

Front

What does it mean for a sample to be unbiased?

Back

An unbiased sample accurately represents the population, allowing for valid conclusions to be drawn.

Front

What does it mean for a sample to be biased?

Back

A biased sample does not accurately represent the population, leading to skewed or invalid conclusions.

Front

Why is random selection important in sampling?

Back

Random selection helps ensure that every member of the population has an equal chance of being included, reducing bias.

Front

What is the difference between a population and a sample?

Back

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

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 and randomly selecting samples from each subgroup.

Front

What is a survey?

Back

A survey is a method of collecting data by asking people questions to gather information about their opinions or behaviors.

Front

What is the purpose of using samples in research?

Back

Samples are used to make inferences about a population without needing to study the entire group.

Front

What is a sampling error?

Back

A sampling error is the difference between the results obtained from a sample and the actual values in the population.