Sampling and Bias

What is a census?

• A list of all individuals in a population

• A sample of individuals from a population

• A survey conducted every twenty years

• A numerical measure of a population

What is the purpose of a census?

• To count the number of people in a country

• To create a representative sample of the population

• To select individuals for a sample

• To estimate the cost of living

What is a simple random sample (SRS)?

• A sample where every individual has an equal chance of being selected

• A sample obtained through convenience

• A sample that includes only volunteers

• A sample that is easily obtained from a population

What is a convenience sample?

• A sample that is easily obtained

• A sample that includes all individuals in a population

• A sample that is randomly selected

• A sample that is representative of the population

What is a source of bias in sampling?

• Sampling bias

• Nonresponse bias

• Response bias

• All of the above

What is undercoverage?

• When the sample does not include all segments of the population

• When individuals in the sample do not respond to the survey

• When the answers on a survey do not reflect true feelings

• When the technique used to obtain the sample favors one part of the population

What is nonresponse bias?

• When the sample does not include all segments of the population

• When individuals in the sample do not respond to the survey

• When the answers on a survey do not reflect true feelings

• When the technique used to obtain the sample favors one part of the population

What is response bias?

• When the sample does not include all segments of the population

• When individuals in the sample do not respond to the survey

• When the answers on a survey do not reflect true feelings

• When the technique used to obtain the sample favors one part of the population

What can cause response bias?

• Interviewer error

• Misrepresented answers

• Loaded questions

• All of the above

How can the order of a question affect responses?

• It can change the way a person responds

• It can make the survey longer

• It can make the survey more expensive

• It can make the survey biased