Samples, Experiments and Observational Studies

When a sample does not accurately represent the population it is

• an unbiased sample

• a biased sample

• a random sample

• a census

A public library asked every 10th person who entered to name the type of book they were getting. This is an example of

• simple random sampling

• systematic random sampling

• cluster sampling

• stratified sampling

Carlos wants to know the favorite sport of people at his school so he asks his baseball team. This is an example of

• Simple Random Sampling

• Convenience Sampling

• Voluntary Sampling

• Systematic sampling

A senator wants to how she is doing. She invites 1000 registered voters in her party to complete a survey. This is an example of

• simple random sample

• voluntary sample

• convenience sample

• cluster sample

A sample in which every person, object, or event has an equal chance of being selected.

• simple random sample

• cluster sample

• stratified sample

• voluntary sample

A sample where the population is divided into groups based on some characteristic and then individuals are randomly chosen from each group.

• simple random sample

• cluster sample

• stratified sample

• voluntary sample

This type of sample is often made up of people that have strong interest in the topic of the survey

• simple random sample

• cluster sample

• stratified sample

• voluntary sample

_______ is a part of a group being surveyed.

• Sample

• Population

• Bias

• Census

_______ is the entire group of objects or individuals considered for a survey.

• Sample

• Population

• Random Sample

• Bias

A sample where the population is divided into groups based on location and then individuals are randomly chosen from each group.

• simple random sample

• cluster sample

• stratified sample

• voluntary sample