Understanding Sampling Methods

What is a sample in the context of statistical analysis?

• A random selection of individuals

• A biased selection of individuals

• The entire population being studied

• A subgroup representing the entire population

Which of the following is a characteristic of a simple random sample?

• It only includes volunteers

• It selects every nth member of the population

• Each member of the population has an equal chance of being selected

• It divides the population into groups

How does a stratified random sample differ from a simple random sample?

• It selects every nth individual

• It divides the population into non-overlapping groups and samples from each

• It divides the population into overlapping groups

• It selects individuals based on convenience

What is a systematic random sample?

• A sample where individuals volunteer to participate

• A sample where every nth individual is selected

• A sample that includes only easily accessible individuals

• A sample that divides the population into groups

What is a convenience sample?

• A sample that divides the population into groups

• A sample that includes only volunteers

• A sample that is representative of the entire population

• A sample that includes easily accessible members of the population

Why is a voluntary response sample considered biased?

• It includes only those who are easily accessible

• It divides the population into groups

• It includes only those who choose to participate

• It selects every nth individual

In the hardware store example, why is the sample considered biased?

• It is a simple random sample

• It divides customers into groups

• It relies on customers choosing to call in

• It includes every customer

In Mr. Steven's survey, what type of sampling method was used?

• Convenience sample

• Voluntary response sample

• Systematic random sample

• Stratified random sample

How many students would you expect to prefer the beach if 48% of 560 students prefer it?

• 271

• 270

• 269

• 268

Why was the music preference survey considered biased?

• It was a stratified random sample

• It only surveyed students with MP3 players

• It was a systematic random sample

• It included all students