Question

a researcher polls people as they walk by on the street. what type of sample is this? choose 1 answer: a simple random sample b stratified random sample c cluster random sample d systematic random sample e none of the above

Explanation:

A simple - random sample requires every member of the population to have an equal chance of being selected. Stratified random sampling divides the population into subgroups (strata) and samples from each. Cluster random sampling divides the population into clusters and samples whole clusters. Systematic random sampling selects every k - th element. Polling people as they walk by on the street is a convenience sample as it is based on ease of access, not any of the above - mentioned structured sampling methods.

Answer:

E. None of the above