Population and Samples

Front

What is a population in statistics?

Back

The entire collection of objects being surveyed.

Front

What is a sample in statistics?

Back

A subset of the population selected for analysis.

Front

Why is it important for a sample to be representative?

Back

A representative sample accurately reflects the characteristics of the population, leading to valid conclusions.

Front

What does it mean for a sample to be random?

Back

A random sample is one where every member of the population has an equal chance of being selected.

Front

What is sampling bias?

Back

Sampling bias occurs when certain members of the population are more likely to be selected than others, leading to an unrepresentative sample.

Front

What is the difference between a population and a sample?

Back

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

Front

What is the purpose of surveying a sample?

Back

To make inferences about the population without surveying every member.

Front

What is a convenience sample?

Back

A convenience sample is a type of non-random sampling where members are selected based on their easy availability.

Front

What is a stratified sample?

Back

A stratified sample is created by dividing the population into subgroups and randomly selecting members from each subgroup.

Front

What is a systematic sample?

Back

A systematic sample is obtained by selecting every nth member of the population after a random starting point.