Chapter 11 AP stats vocab

SRS (simple random sample)

a sample in which each set of “n” elements has the same chance of being selected.

Stratified sampling

divide the population into groups then choose an SRS from each group.

Cluster sampling

divide the population into heterogeneous groups then randomly select through SRS.

Systematic sampling

start with a random number and choose every x number.

Multistage Sampling

combination of techniques.

convenience sample

asking individuals who are always available.

Sample volunteers

a large group of people is invited to respond, and those who choose to respond are counted.

Sample Conveniently

includes individuals who are convenient to sample.

Undercoverage

some portion of the population that is not in the sample.

Non response bias

not receiving responses from everyone surveyed.

Response bias

the tendency of respondents to tailor their responses to please the interviewer or provide inaccurate information.

Wording bias

the wording of the questions can influence the response.